/*!
 * Vue.js v2.6.8
 * (c) 2014-2019 Evan You
 * Released under the MIT License.
 */
(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = global || self, global.Vue = factory());
}(this, function () { 'use strict';

/*  */

var emptyObject = Object.freeze({});

// These helpers produce better VM code in JS engines due to their
// explicitness and function inlining.
   function isUndef (v) {
    return v === undefined || v === null
}

function isDef (v) {
    return v !== undefined && v !== null
}

function isTrue (v) {
    return v === true
}

function isFalse (v) {
    return v === false
}

/**
   * Check if value is primitive.
   */
function isPrimitive (value) {
    return (
    typeof value === 'string' ||
    typeof value === 'number' ||
    // $flow-disable-line
    typeof value === 'symbol' ||
    typeof value === 'boolean'
)
}

/**
   * Quick object check - this is primarily used to tell
   * Objects from primitive values when we know the value
   * is a JSON-compliant type.
   */
function isObject (obj) {
    return obj !== null && typeof obj === 'object'
}

/**
   * Get the raw type string of a value, e.g., [object Object].
   */
var _toString = Object.prototype.toString;

function toRawType (value) {
    return _toString.call(value).slice(8, -1)
}

/**
   * Strict object type check. Only returns true
   * for plain JavaScript objects.
   */
function isPlainObject (obj) {
    return _toString.call(obj) === '[object Object]'
}

function isRegExp (v) {
    return _toString.call(v) === '[object RegExp]'
}

/**
   * Check if val is a valid array index.
   */
function isValidArrayIndex (val) {
    var n = parseFloat(String(val));
    return n >= 0 && Math.floor(n) === n && isFinite(val)
}

function isPromise (val) {
    return (
    isDef(val) &&
    typeof val.then === 'function' &&
    typeof val.catch === 'function'
)
}

/**
   * Convert a value to a string that is actually rendered.
   */
function toString (val) {
    return val == null
    ? ''
: Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
? JSON.stringify(val, null, 2)
: String(val)
}

/**
   * Convert an input value to a number for persistence.
   * If the conversion fails, return original string.
   */
function toNumber (val) {
    var n = parseFloat(val);
    return isNaN(n) ? val : n
}

/**
   * Make a map and return a function for checking if a key
   * is in that map.
   */
function makeMap (
str,
expectsLowerCase
) {
    var map = Object.create(null);
    var list = str.split(',');
    for (var i = 0; i < list.length; i++) {
    map[list[i]] = true;
}
return expectsLowerCase
      ? function (val) { return map[val.toLowerCase()]; }
: function (val) { return map[val]; }
}

/**
   * Check if a tag is a built-in tag.
   */
var isBuiltInTag = makeMap('slot,component', true);

/**
   * Check if an attribute is a reserved attribute.
   */
var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');

/**
   * Remove an item from an array.
   */
function remove (arr, item) {
if (arr.length) {
    var index = arr.indexOf(item);
if (index > -1) {
    return arr.splice(index, 1)
}
}
}

/**
   * Check whether an object has the property.
   */
var hasOwnProperty = Object.prototype.hasOwnProperty;
function hasOwn (obj, key) {
    return hasOwnProperty.call(obj, key)
}

/**
   * Create a cached version of a pure function.
   */
function cached (fn) {
    var cache = Object.create(null);
return (function cachedFn (str) {
    var hit = cache[str];
    return hit || (cache[str] = fn(str))
})
}

/**
   * Camelize a hyphen-delimited string.
   */
var camelizeRE = /-(\w)/g;
var camelize = cached(function (str) {
return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
});

/**
   * Capitalize a string.
   */
var capitalize = cached(function (str) {
    return str.charAt(0).toUpperCase() + str.slice(1)
});

/**
   * Hyphenate a camelCase string.
   */
var hyphenateRE = /\B([A-Z])/g;
var hyphenate = cached(function (str) {
    return str.replace(hyphenateRE, '-$1').toLowerCase()
});

/**
   * Simple bind polyfill for environments that do not support it,
   * e.g., PhantomJS 1.x. Technically, we don't need this anymore
   * since native bind is now performant enough in most browsers.
   * But removing it would mean breaking code that was able to run in
   * PhantomJS 1.x, so this must be kept for backward compatibility.
   */

/* istanbul ignore next */
function polyfillBind (fn, ctx) {
function boundFn (a) {
    var l = arguments.length;
    return l
    ? l > 1
    ? fn.apply(ctx, arguments)
: fn.call(ctx, a)
: fn.call(ctx)
}

boundFn._length = fn.length;
return boundFn
}

function nativeBind (fn, ctx) {
    return fn.bind(ctx)
}

var bind = Function.prototype.bind
? nativeBind
  : polyfillBind;

/**
   * Convert an Array-like object to a real Array.
   */
function toArray (list, start) {
    start = start || 0;
    var i = list.length - start;
    var ret = new Array(i);
while (i--) {
    ret[i] = list[i + start];
}
return ret
}

/**
   * Mix properties into target object.
   */
function extend (to, _from) {
for (var key in _from) {
    to[key] = _from[key];
}
return to
}

/**
   * Merge an Array of Objects into a single Object.
   */
function toObject (arr) {
var res = {};
for (var i = 0; i < arr.length; i++) {
if (arr[i]) {
extend(res, arr[i]);
}
}
return res
}

/* eslint-disable no-unused-vars */

/**
   * Perform no operation.
   * Stubbing args to make Flow happy without leaving useless transpiled code
   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
   */
function noop (a, b, c) {}

/**
   * Always return false.
   */
var no = function (a, b, c) { return false; };

/* eslint-enable no-unused-vars */

/**
   * Return the same value.
   */
var identity = function (_) { return _; };

/**
   * Generate a string containing static keys from compiler modules.
   */
function genStaticKeys (modules) {
return modules.reduce(function (keys, m) {
    return keys.concat(m.staticKeys || [])
}, []).join(',')
}

/**
   * Check if two values are loosely equal - that is,
   * if they are plain objects, do they have the same shape?
   */
function looseEqual (a, b) {
if (a === b) { return true }
var isObjectA = isObject(a);
var isObjectB = isObject(b);
if (isObjectA && isObjectB) {
try {
    var isArrayA = Array.isArray(a);
    var isArrayB = Array.isArray(b);
if (isArrayA && isArrayB) {
return a.length === b.length && a.every(function (e, i) {
    return looseEqual(e, b[i])
})
} else if (a instanceof Date && b instanceof Date) {
    return a.getTime() === b.getTime()
} else if (!isArrayA && !isArrayB) {
    var keysA = Object.keys(a);
    var keysB = Object.keys(b);
return keysA.length === keysB.length && keysA.every(function (key) {
    return looseEqual(a[key], b[key])
})
} else {
      /* istanbul ignore next */
      return false
  }
} catch (e) {
/* istanbul ignore next */
    return false
}
} else if (!isObjectA && !isObjectB) {
    return String(a) === String(b)
} else {
      return false
  }
}

/**
   * Return the first index at which a loosely equal value can be
   * found in the array (if value is a plain object, the array must
   * contain an object of the same shape), or -1 if it is not present.
   */
function looseIndexOf (arr, val) {
    for (var i = 0; i < arr.length; i++) {
if (looseEqual(arr[i], val)) { return i }
}
return -1
}

/**
   * Ensure a function is called only once.
   */
function once (fn) {
    var called = false;
return function () {
if (!called) {
    called = true;
    fn.apply(this, arguments);
}
}
}

var SSR_ATTR = 'data-server-rendered';

var ASSET_TYPES = [
'component',
'directive',
'filter'
];

var LIFECYCLE_HOOKS = [
'beforeCreate',
'created',
'beforeMount',
'mounted',
'beforeUpdate',
'updated',
'beforeDestroy',
'destroyed',
'activated',
'deactivated',
'errorCaptured',
'serverPrefetch'
];

/*  */



var config = ({
/**
     * Option merge strategies (used in core/util/options)
     */
// $flow-disable-line
optionMergeStrategies: Object.create(null),

/**
     * Whether to suppress warnings.
     */
silent: false,

/**
     * Show production mode tip message on boot?
     */
productionTip: "development" !== 'production',

/**
     * Whether to enable devtools
     */
devtools: "development" !== 'production',

/**
     * Whether to record perf
     */
performance: false,

/**
     * Error handler for watcher errors
     */
errorHandler: null,

/**
     * Warn handler for watcher warns
     */
warnHandler: null,

/**
     * Ignore certain custom elements
     */
ignoredElements: [],

/**
     * Custom user key aliases for v-on
     */
// $flow-disable-line
keyCodes: Object.create(null),

/**
     * Check if a tag is reserved so that it cannot be registered as a
     * component. This is platform-dependent and may be overwritten.
     */
isReservedTag: no,

/**
     * Check if an attribute is reserved so that it cannot be used as a component
     * prop. This is platform-dependent and may be overwritten.
     */
isReservedAttr: no,

/**
     * Check if a tag is an unknown element.
     * Platform-dependent.
     */
isUnknownElement: no,

/**
     * Get the namespace of an element
     */
getTagNamespace: noop,

/**
     * Parse the real tag name for the specific platform.
     */
parsePlatformTagName: identity,

/**
     * Check if an attribute must be bound using property, e.g. value
     * Platform-dependent.
     */
mustUseProp: no,

/**
     * Perform updates asynchronously. Intended to be used by Vue Test Utils
     * This will significantly reduce performance if set to false.
     */
async: true,

/**
     * Exposed for legacy reasons
     */
_lifecycleHooks: LIFECYCLE_HOOKS
});

/*  */

/**
   * unicode letters used for parsing html tags, component names and property paths.
   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
   * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
   */
var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;

/**
   * Check if a string starts with $ or _
   */
function isReserved (str) {
    var c = (str + '').charCodeAt(0);
    return c === 0x24 || c === 0x5F
}

/**
   * Define a property.
   */
function def (obj, key, val, enumerable) {
Object.defineProperty(obj, key, {
                          value: val,
                          enumerable: !!enumerable,
                          writable: true,
                          configurable: true
                      });
}

/**
   * Parse simple path.
   */
var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
function parsePath (path) {
if (bailRE.test(path)) {
    return
}
var segments = path.split('.');
return function (obj) {
    for (var i = 0; i < segments.length; i++) {
if (!obj) { return }
obj = obj[segments[i]];
}
return obj
}
}

/*  */

// can we use __proto__?
   var hasProto = '__proto__' in {};

// Browser environment sniffing
   var inBrowser = typeof window !== 'undefined';
var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
var UA = inBrowser && window.navigator.userAgent.toLowerCase();
var isIE = UA && /msie|trident/.test(UA);
var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
var isEdge = UA && UA.indexOf('edge/') > 0;
var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
var isPhantomJS = UA && /phantomjs/.test(UA);
var isFF = UA && UA.match(/firefox\/(\d+)/);

// Firefox has a "watch" function on Object.prototype...
                         var nativeWatch = ({}).watch;

var supportsPassive = false;
if (inBrowser) {
try {
var opts = {};
Object.defineProperty(opts, 'passive', ({
get: function get () {
/* istanbul ignore next */
    supportsPassive = true;
}
})); // https://github.com/facebook/flow/issues/285
window.addEventListener('test-passive', null, opts);
} catch (e) {}
}

// this needs to be lazy-evaled because vue may be required before
// vue-server-renderer can set VUE_ENV
   var _isServer;
var isServerRendering = function () {
if (_isServer === undefined) {
/* istanbul ignore if */
if (!inBrowser && !inWeex && typeof global !== 'undefined') {
// detect presence of vue-server-renderer and avoid
// Webpack shimming the process
_isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
} else {
      _isServer = false;
  }
}
return _isServer
};

// detect devtools
   var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;

/* istanbul ignore next */
function isNative (Ctor) {
    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
}

var hasSymbol =
typeof Symbol !== 'undefined' && isNative(Symbol) &&
typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);

var _Set;
/* istanbul ignore if */ // $flow-disable-line
                             if (typeof Set !== 'undefined' && isNative(Set)) {
// use native Set when available.
_Set = Set;
} else {
// a non-standard Set polyfill that only works with primitive keys.
   _Set = /*@__PURE__*/(function () {
function Set () {
    this.set = Object.create(null);
}
Set.prototype.has = function has (key) {
    return this.set[key] === true
};
Set.prototype.add = function add (key) {
    this.set[key] = true;
};
Set.prototype.clear = function clear () {
    this.set = Object.create(null);
};

return Set;
}());
}

/*  */

var warn = noop;
var tip = noop;
var generateComponentTrace = (noop); // work around flow check
                                        var formatComponentName = (noop);

{
    var hasConsole = typeof console !== 'undefined';
    var classifyRE = /(?:^|[-_])(\w)/g;
var classify = function (str) { return str
                                .replace(classifyRE, function (c) { return c.toUpperCase(); })
.replace(/[-_]/g, ''); };

warn = function (msg, vm) {
    var trace = vm ? generateComponentTrace(vm) : '';

if (config.warnHandler) {
    config.warnHandler.call(null, msg, vm, trace);
} else if (hasConsole && (!config.silent)) {
    console.error(("[Vue warn]: " + msg + trace));
}
};

tip = function (msg, vm) {
if (hasConsole && (!config.silent)) {
    console.warn("[Vue tip]: " + msg + (
    vm ? generateComponentTrace(vm) : ''
));
}
};

formatComponentName = function (vm, includeFile) {
if (vm.$root === vm) {
    return '<Root>'
}
var options = typeof vm === 'function' && vm.cid != null
        ? vm.options
                                                    : vm._isVue
? vm.$options || vm.constructor.options
  : vm;
var name = options.name || options._componentTag;
var file = options.__file;
if (!name && file) {
    var match = file.match(/([^/\\]+)\.vue$/);
    name = match && match[1];
}

return (
(name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
(file && includeFile !== false ? (" at " + file) : '')
)
};

var repeat = function (str, n) {
    var res = '';
while (n) {
if (n % 2 === 1) { res += str; }
if (n > 1) { str += str; }
n >>= 1;
}
return res
};

generateComponentTrace = function (vm) {
if (vm._isVue && vm.$parent) {
    var tree = [];
    var currentRecursiveSequence = 0;
while (vm) {
if (tree.length > 0) {
    var last = tree[tree.length - 1];
if (last.constructor === vm.constructor) {
    currentRecursiveSequence++;
    vm = vm.$parent;
    continue
} else if (currentRecursiveSequence > 0) {
    tree[tree.length - 1] = [last, currentRecursiveSequence];
    currentRecursiveSequence = 0;
}
}
tree.push(vm);
vm = vm.$parent;
}
return '\n\nfound in\n\n' + tree
                          .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
: formatComponentName(vm))); })
.join('\n')
} else {
      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
  }
};
}

/*  */

var uid = 0;

/**
   * A dep is an observable that can have multiple
   * directives subscribing to it.
   */
var Dep = function Dep () {
    this.id = uid++;
    this.subs = [];
};

Dep.prototype.addSub = function addSub (sub) {
    this.subs.push(sub);
};

Dep.prototype.removeSub = function removeSub (sub) {
remove(this.subs, sub);
};

Dep.prototype.depend = function depend () {
if (Dep.target) {
    Dep.target.addDep(this);
}
};

Dep.prototype.notify = function notify () {
// stabilize the subscriber list first
var subs = this.subs.slice();
if (!config.async) {
// subs aren't sorted in scheduler if not running async
// we need to sort them now to make sure they fire in correct
// order
   subs.sort(function (a, b) { return a.id - b.id; });
}
for (var i = 0, l = subs.length; i < l; i++) {
    subs[i].update();
}
};

// The current target watcher being evaluated.
// This is globally unique because only one watcher
// can be evaluated at a time.
   Dep.target = null;
var targetStack = [];

function pushTarget (target) {
    targetStack.push(target);
    Dep.target = target;
}

function popTarget () {
    targetStack.pop();
    Dep.target = targetStack[targetStack.length - 1];
}

/*  */

var VNode = function VNode (
tag,
data,
children,
text,
elm,
context,
componentOptions,
asyncFactory
) {
    this.tag = tag;
    this.data = data;
    this.children = children;
    this.text = text;
    this.elm = elm;
    this.ns = undefined;
    this.context = context;
    this.fnContext = undefined;
    this.fnOptions = undefined;
    this.fnScopeId = undefined;
    this.key = data && data.key;
    this.componentOptions = componentOptions;
    this.componentInstance = undefined;
    this.parent = undefined;
    this.raw = false;
    this.isStatic = false;
    this.isRootInsert = true;
    this.isComment = false;
    this.isCloned = false;
    this.isOnce = false;
    this.asyncFactory = asyncFactory;
    this.asyncMeta = undefined;
    this.isAsyncPlaceholder = false;
};

var prototypeAccessors = { child: { configurable: true } };

// DEPRECATED: alias for componentInstance for backwards compat.
       /* istanbul ignore next */
   prototypeAccessors.child.get = function () {
    return this.componentInstance
};

Object.defineProperties( VNode.prototype, prototypeAccessors );

var createEmptyVNode = function (text) {
    if ( text === void 0 ) text = '';

    var node = new VNode();
    node.text = text;
    node.isComment = true;
    return node
};

function createTextVNode (val) {
    return new VNode(undefined, undefined, undefined, String(val))
}

// optimized shallow clone
// used for static nodes and slot nodes because they may be reused across
// multiple renders, cloning them avoids errors when DOM manipulations rely
// on their elm reference.
   function cloneVNode (vnode) {
    var cloned = new VNode(
    vnode.tag,
    vnode.data,
    // #7975
    // clone children array to avoid mutating original in case of cloning
    // a child.
    vnode.children && vnode.children.slice(),
    vnode.text,
    vnode.elm,
    vnode.context,
    vnode.componentOptions,
    vnode.asyncFactory
    );
    cloned.ns = vnode.ns;
    cloned.isStatic = vnode.isStatic;
    cloned.key = vnode.key;
    cloned.isComment = vnode.isComment;
    cloned.fnContext = vnode.fnContext;
    cloned.fnOptions = vnode.fnOptions;
    cloned.fnScopeId = vnode.fnScopeId;
    cloned.asyncMeta = vnode.asyncMeta;
    cloned.isCloned = true;
    return cloned
}

/*
   * not type checking this file because flow doesn't play well with
   * dynamically accessing methods on Array prototype
   */

var arrayProto = Array.prototype;
var arrayMethods = Object.create(arrayProto);

var methodsToPatch = [
'push',
'pop',
'shift',
'unshift',
'splice',
'sort',
'reverse'
];

/**
   * Intercept mutating methods and emit events
   */
methodsToPatch.forEach(function (method) {
// cache original method
var original = arrayProto[method];
def(arrayMethods, method, function mutator () {
    var args = [], len = arguments.length;
    while ( len-- ) args[ len ] = arguments[ len ];

    var result = original.apply(this, args);
    var ob = this.__ob__;
    var inserted;
switch (method) {
    case 'push':
    case 'unshift':
inserted = args;
    break
            case 'splice':
inserted = args.slice(2);
    break
}
if (inserted) { ob.observeArray(inserted); }
// notify change
   ob.dep.notify();
return result
});
});

/*  */

var arrayKeys = Object.getOwnPropertyNames(arrayMethods);

/**
   * In some cases we may want to disable observation inside a component's
   * update computation.
   */
var shouldObserve = true;

function toggleObserving (value) {
    shouldObserve = value;
}

/**
   * Observer class that is attached to each observed
   * object. Once attached, the observer converts the target
   * object's property keys into getter/setters that
   * collect dependencies and dispatch updates.
   */
var Observer = function Observer (value) {
    this.value = value;
    this.dep = new Dep();
    this.vmCount = 0;
def(value, '__ob__', this);
if (Array.isArray(value)) {
if (hasProto) {
protoAugment(value, arrayMethods);
} else {
  copyAugment(value, arrayMethods, arrayKeys);
  }
this.observeArray(value);
} else {
      this.walk(value);
  }
};

/**
   * Walk through all properties and convert them into
   * getter/setters. This method should only be called when
   * value type is Object.
   */
Observer.prototype.walk = function walk (obj) {
    var keys = Object.keys(obj);
    for (var i = 0; i < keys.length; i++) {
    defineReactive$$1(obj, keys[i]);
}
};

/**
   * Observe a list of Array items.
   */
Observer.prototype.observeArray = function observeArray (items) {
    for (var i = 0, l = items.length; i < l; i++) {
observe(items[i]);
}
};

// helpers

       /**
   * Augment a target Object or Array by intercepting
   * the prototype chain using __proto__
   */
   function protoAugment (target, src) {
/* eslint-disable no-proto */
    target.__proto__ = src;
/* eslint-enable no-proto */
}

/**
   * Augment a target Object or Array by defining
   * hidden properties.
   */
/* istanbul ignore next */
function copyAugment (target, src, keys) {
    for (var i = 0, l = keys.length; i < l; i++) {
    var key = keys[i];
def(target, key, src[key]);
}
}

/**
   * Attempt to create an observer instance for a value,
   * returns the new observer if successfully observed,
   * or the existing observer if the value already has one.
   */
function observe (value, asRootData) {
if (!isObject(value) || value instanceof VNode) {
    return
}
var ob;
if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
    ob = value.__ob__;
} else if (
shouldObserve &&
!isServerRendering() &&
(Array.isArray(value) || isPlainObject(value)) &&
Object.isExtensible(value) &&
!value._isVue
) {
    ob = new Observer(value);
}
if (asRootData && ob) {
    ob.vmCount++;
}
return ob
}

/**
   * Define a reactive property on an Object.
   */
function defineReactive$$1 (
obj,
key,
val,
customSetter,
shallow
) {
    var dep = new Dep();

    var property = Object.getOwnPropertyDescriptor(obj, key);
if (property && property.configurable === false) {
    return
}

// cater for pre-defined getter/setters
                                var getter = property && property.get;
var setter = property && property.set;
if ((!getter || setter) && arguments.length === 2) {
    val = obj[key];
}

var childOb = !shallow && observe(val);
Object.defineProperty(obj, key, {
enumerable: true,
configurable: true,
get: function reactiveGetter () {
    var value = getter ? getter.call(obj) : val;
if (Dep.target) {
    dep.depend();
if (childOb) {
    childOb.dep.depend();
if (Array.isArray(value)) {
dependArray(value);
}
}
}
return value
},
set: function reactiveSetter (newVal) {
    var value = getter ? getter.call(obj) : val;
/* eslint-disable no-self-compare */
if (newVal === value || (newVal !== newVal && value !== value)) {
    return
}
/* eslint-enable no-self-compare */
if (customSetter) {
customSetter();
}
// #7981: for accessor properties without setter
   if (getter && !setter) { return }
if (setter) {
    setter.call(obj, newVal);
} else {
      val = newVal;
  }
childOb = !shallow && observe(newVal);
dep.notify();
}
});
}

/**
   * Set a property on an object. Adds the new property and
   * triggers change notification if the property doesn't
   * already exist.
   */
function set (target, key, val) {
if (isUndef(target) || isPrimitive(target)
) {
warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
}
if (Array.isArray(target) && isValidArrayIndex(key)) {
    target.length = Math.max(target.length, key);
    target.splice(key, 1, val);
    return val
}
if (key in target && !(key in Object.prototype)) {
    target[key] = val;
    return val
}
var ob = (target).__ob__;
if (target._isVue || (ob && ob.vmCount)) {
warn(
'Avoid adding reactive properties to a Vue instance or its root $data ' +
'at runtime - declare it upfront in the data option.'
);
    return val
}
if (!ob) {
    target[key] = val;
    return val
}
defineReactive$$1(ob.value, key, val);
ob.dep.notify();
return val
}

/**
   * Delete a property and trigger change if necessary.
   */
function del (target, key) {
if (isUndef(target) || isPrimitive(target)
) {
warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
}
if (Array.isArray(target) && isValidArrayIndex(key)) {
    target.splice(key, 1);
    return
}
var ob = (target).__ob__;
if (target._isVue || (ob && ob.vmCount)) {
warn(
'Avoid deleting properties on a Vue instance or its root $data ' +
'- just set it to null.'
);
    return
}
if (!hasOwn(target, key)) {
    return
}
delete target[key];
if (!ob) {
    return
}
ob.dep.notify();
}

/**
   * Collect dependencies on array elements when the array is touched, since
   * we cannot intercept array element access like property getters.
   */
function dependArray (value) {
    for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
    e = value[i];
    e && e.__ob__ && e.__ob__.dep.depend();
if (Array.isArray(e)) {
dependArray(e);
}
}
}

/*  */

/**
   * Option overwriting strategies are functions that handle
   * how to merge a parent option value and a child option
   * value into the final value.
   */
var strats = config.optionMergeStrategies;

/**
   * Options with restrictions
   */
{
strats.el = strats.propsData = function (parent, child, vm, key) {
if (!vm) {
warn(
"option \"" + key + "\" can only be used during instance " +
'creation with the `new` keyword.'
);
}
return defaultStrat(parent, child)
};
}

/**
   * Helper that recursively merges two data objects together.
   */
function mergeData (to, from) {
if (!from) { return to }
var key, toVal, fromVal;

var keys = hasSymbol
      ? Reflect.ownKeys(from)
: Object.keys(from);

for (var i = 0; i < keys.length; i++) {
    key = keys[i];
// in case the object is already observed...
   if (key === '__ob__') { continue }
toVal = to[key];
fromVal = from[key];
if (!hasOwn(to, key)) {
set(to, key, fromVal);
} else if (
toVal !== fromVal &&
isPlainObject(toVal) &&
isPlainObject(fromVal)
) {
mergeData(toVal, fromVal);
}
}
return to
}

/**
   * Data
   */
function mergeDataOrFn (
parentVal,
childVal,
vm
) {
if (!vm) {
// in a Vue.extend merge, both should be functions
if (!childVal) {
    return parentVal
}
if (!parentVal) {
    return childVal
}
// when parentVal & childVal are both present,
// we need to return a function that returns the
// merged result of both functions... no need to
// check if parentVal is a function here because
// it has to be a function to pass previous merges.
   return function mergedDataFn () {
    return mergeData(
    typeof childVal === 'function' ? childVal.call(this, this) : childVal,
typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
)
}
} else {
return function mergedInstanceDataFn () {
// instance merge
var instanceData = typeof childVal === 'function'
? childVal.call(vm, vm)
: childVal;
    var defaultData = typeof parentVal === 'function'
    ? parentVal.call(vm, vm)
: parentVal;
if (instanceData) {
    return mergeData(instanceData, defaultData)
} else {
      return defaultData
  }
}
}
}

strats.data = function (
parentVal,
childVal,
vm
) {
if (!vm) {
if (childVal && typeof childVal !== 'function') {
warn(
'The "data" option should be a function ' +
'that returns a per-instance value in component ' +
'definitions.',
vm
);

    return parentVal
}
return mergeDataOrFn(parentVal, childVal)
}

return mergeDataOrFn(parentVal, childVal, vm)
};

/**
   * Hooks and props are merged as arrays.
   */
function mergeHook (
parentVal,
childVal
) {
    var res = childVal
    ? parentVal
    ? parentVal.concat(childVal)
: Array.isArray(childVal)
? childVal
: [childVal]
: parentVal;
    return res
    ? dedupeHooks(res)
: res
}

function dedupeHooks (hooks) {
    var res = [];
    for (var i = 0; i < hooks.length; i++) {
if (res.indexOf(hooks[i]) === -1) {
    res.push(hooks[i]);
}
}
return res
}

LIFECYCLE_HOOKS.forEach(function (hook) {
    strats[hook] = mergeHook;
});

/**
   * Assets
   *
   * When a vm is present (instance creation), we need to do
   * a three-way merge between constructor options, instance
   * options and parent options.
   */
function mergeAssets (
parentVal,
childVal,
vm,
key
) {
    var res = Object.create(parentVal || null);
if (childVal) {
assertObjectType(key, childVal, vm);
    return extend(res, childVal)
} else {
      return res
  }
}

ASSET_TYPES.forEach(function (type) {
    strats[type + 's'] = mergeAssets;
});

/**
   * Watchers.
   *
   * Watchers hashes should not overwrite one
   * another, so we merge them as arrays.
   */
strats.watch = function (
parentVal,
childVal,
vm,
key
) {
// work around Firefox's Object.prototype.watch...
if (parentVal === nativeWatch) { parentVal = undefined; }
if (childVal === nativeWatch) { childVal = undefined; }
/* istanbul ignore if */
if (!childVal) { return Object.create(parentVal || null) }
{
assertObjectType(key, childVal, vm);
}
if (!parentVal) { return childVal }
var ret = {};
extend(ret, parentVal);
for (var key$1 in childVal) {
    var parent = ret[key$1];
    var child = childVal[key$1];
if (parent && !Array.isArray(parent)) {
    parent = [parent];
}
ret[key$1] = parent
        ? parent.concat(child)
: Array.isArray(child) ? child : [child];
}
return ret
};

/**
   * Other object hashes.
   */
strats.props =
strats.methods =
strats.inject =
strats.computed = function (
parentVal,
childVal,
vm,
key
) {
if (childVal && "development" !== 'production') {
assertObjectType(key, childVal, vm);
}
if (!parentVal) { return childVal }
var ret = Object.create(null);
extend(ret, parentVal);
if (childVal) { extend(ret, childVal); }
return ret
};
strats.provide = mergeDataOrFn;

/**
   * Default strategy.
   */
var defaultStrat = function (parentVal, childVal) {
    return childVal === undefined
    ? parentVal
: childVal
};

/**
   * Validate component names
   */
function checkComponents (options) {
for (var key in options.components) {
validateComponentName(key);
}
}

function validateComponentName (name) {
if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
warn(
'Invalid component name: "' + name + '". Component names ' +
'should conform to valid custom element name in html5 specification.'
);
}
if (isBuiltInTag(name) || config.isReservedTag(name)) {
warn(
'Do not use built-in or reserved HTML elements as component ' +
'id: ' + name
);
}
}

/**
   * Ensure all props option syntax are normalized into the
   * Object-based format.
   */
function normalizeProps (options, vm) {
    var props = options.props;
if (!props) { return }
var res = {};
var i, val, name;
if (Array.isArray(props)) {
    i = props.length;
while (i--) {
    val = props[i];
if (typeof val === 'string') {
    name = camelize(val);
res[name] = { type: null };
} else {
  warn('props must be strings when using array syntax.');
  }
}
} else if (isPlainObject(props)) {
for (var key in props) {
    val = props[key];
    name = camelize(key);
res[name] = isPlainObject(val)
? val
  : { type: val };
}
} else {
  warn(
  "Invalid value for option \"props\": expected an Array or an Object, " +
  "but got " + (toRawType(props)) + ".",
  vm
  );
  }
options.props = res;
}

/**
   * Normalize all injections into Object-based format
   */
function normalizeInject (options, vm) {
    var inject = options.inject;
if (!inject) { return }
var normalized = options.inject = {};
if (Array.isArray(inject)) {
    for (var i = 0; i < inject.length; i++) {
normalized[inject[i]] = { from: inject[i] };
}
} else if (isPlainObject(inject)) {
for (var key in inject) {
    var val = inject[key];
normalized[key] = isPlainObject(val)
? extend({ from: key }, val)
: { from: val };
}
} else {
  warn(
  "Invalid value for option \"inject\": expected an Array or an Object, " +
  "but got " + (toRawType(inject)) + ".",
  vm
  );
  }
}

/**
   * Normalize raw function directives into object format.
   */
function normalizeDirectives (options) {
    var dirs = options.directives;
if (dirs) {
for (var key in dirs) {
    var def$$1 = dirs[key];
if (typeof def$$1 === 'function') {
dirs[key] = { bind: def$$1, update: def$$1 };
}
}
}
}

function assertObjectType (name, value, vm) {
if (!isPlainObject(value)) {
warn(
"Invalid value for option \"" + name + "\": expected an Object, " +
"but got " + (toRawType(value)) + ".",
vm
);
}
}

/**
   * Merge two option objects into a new one.
   * Core utility used in both instantiation and inheritance.
   */
function mergeOptions (
parent,
child,
vm
) {
{
checkComponents(child);
}

if (typeof child === 'function') {
    child = child.options;
}

normalizeProps(child, vm);
normalizeInject(child, vm);
normalizeDirectives(child);

// Apply extends and mixins on the child options,
// but only if it is a raw options object that isn't
// the result of another mergeOptions call.
// Only merged options has the _base property.
   if (!child._base) {
if (child.extends) {
    parent = mergeOptions(parent, child.extends, vm);
}
if (child.mixins) {
    for (var i = 0, l = child.mixins.length; i < l; i++) {
    parent = mergeOptions(parent, child.mixins[i], vm);
}
}
}

var options = {};
var key;
for (key in parent) {
mergeField(key);
}
for (key in child) {
if (!hasOwn(parent, key)) {
mergeField(key);
}
}
function mergeField (key) {
    var strat = strats[key] || defaultStrat;
    options[key] = strat(parent[key], child[key], vm, key);
}
return options
}

/**
   * Resolve an asset.
   * This function is used because child instances need access
   * to assets defined in its ancestor chain.
   */
function resolveAsset (
options,
type,
id,
warnMissing
) {
/* istanbul ignore if */
if (typeof id !== 'string') {
    return
}
var assets = options[type];
// check local registration variations first
   if (hasOwn(assets, id)) { return assets[id] }
var camelizedId = camelize(id);
if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
var PascalCaseId = capitalize(camelizedId);
if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
// fallback to prototype chain
   var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
if (warnMissing && !res) {
warn(
'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
options
);
}
return res
}

/*  */



function validateProp (
key,
propOptions,
propsData,
vm
) {
    var prop = propOptions[key];
    var absent = !hasOwn(propsData, key);
    var value = propsData[key];
// boolean casting
var booleanIndex = getTypeIndex(Boolean, prop.type);
if (booleanIndex > -1) {
if (absent && !hasOwn(prop, 'default')) {
    value = false;
} else if (value === '' || value === hyphenate(key)) {
// only cast empty string / same name to boolean if
// boolean has higher priority
var stringIndex = getTypeIndex(String, prop.type);
if (stringIndex < 0 || booleanIndex < stringIndex) {
    value = true;
}
}
}
// check default value
   if (value === undefined) {
    value = getPropDefaultValue(vm, prop, key);
// since the default value is a fresh copy,
// make sure to observe it.
var prevShouldObserve = shouldObserve;
toggleObserving(true);
observe(value);
toggleObserving(prevShouldObserve);
}
{
assertProp(prop, key, value, vm, absent);
}
return value
}

/**
   * Get the default value of a prop.
   */
function getPropDefaultValue (vm, prop, key) {
// no default, return undefined
if (!hasOwn(prop, 'default')) {
    return undefined
}
var def = prop.default;
// warn against non-factory defaults for Object & Array
   if (isObject(def)) {
warn(
'Invalid default value for prop "' + key + '": ' +
'Props with type Object/Array must use a factory function ' +
'to return the default value.',
vm
);
}
// the raw prop value was also undefined from previous render,
// return previous default value to avoid unnecessary watcher trigger
   if (vm && vm.$options.propsData &&
vm.$options.propsData[key] === undefined &&
vm._props[key] !== undefined
) {
    return vm._props[key]
}
// call factory function for non-Function types
// a value is Function if its prototype is function even across different execution context
   return typeof def === 'function' && getType(prop.type) !== 'Function'
? def.call(vm)
: def
}

/**
   * Assert whether a prop is valid.
   */
function assertProp (
prop,
name,
value,
vm,
absent
) {
if (prop.required && absent) {
warn(
'Missing required prop: "' + name + '"',
vm
);
    return
}
if (value == null && !prop.required) {
    return
}
var type = prop.type;
var valid = !type || type === true;
var expectedTypes = [];
if (type) {
if (!Array.isArray(type)) {
    type = [type];
}
for (var i = 0; i < type.length && !valid; i++) {
    var assertedType = assertType(value, type[i]);
    expectedTypes.push(assertedType.expectedType || '');
    valid = assertedType.valid;
}
}

if (!valid) {
warn(
getInvalidTypeMessage(name, value, expectedTypes),
vm
);
    return
}
var validator = prop.validator;
if (validator) {
if (!validator(value)) {
warn(
'Invalid prop: custom validator check failed for prop "' + name + '".',
vm
);
}
}
}

var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;

function assertType (value, type) {
    var valid;
    var expectedType = getType(type);
if (simpleCheckRE.test(expectedType)) {
    var t = typeof value;
    valid = t === expectedType.toLowerCase();
// for primitive wrapper objects
   if (!valid && t === 'object') {
    valid = value instanceof type;
}
} else if (expectedType === 'Object') {
    valid = isPlainObject(value);
} else if (expectedType === 'Array') {
    valid = Array.isArray(value);
} else {
      valid = value instanceof type;
  }
return {
    valid: valid,
    expectedType: expectedType
}
}

/**
   * Use function string name to check built-in types,
   * because a simple equality check will fail when running
   * across different vms / iframes.
   */
function getType (fn) {
    var match = fn && fn.toString().match(/^\s*function (\w+)/);
    return match ? match[1] : ''
}

function isSameType (a, b) {
    return getType(a) === getType(b)
}

function getTypeIndex (type, expectedTypes) {
if (!Array.isArray(expectedTypes)) {
    return isSameType(expectedTypes, type) ? 0 : -1
}
for (var i = 0, len = expectedTypes.length; i < len; i++) {
if (isSameType(expectedTypes[i], type)) {
    return i
}
}
return -1
}

function getInvalidTypeMessage (name, value, expectedTypes) {
    var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
    " Expected " + (expectedTypes.map(capitalize).join(', '));
    var expectedType = expectedTypes[0];
    var receivedType = toRawType(value);
    var expectedValue = styleValue(value, expectedType);
    var receivedValue = styleValue(value, receivedType);
// check if we need to specify expected value
   if (expectedTypes.length === 1 &&
isExplicable(expectedType) &&
!isBoolean(expectedType, receivedType)) {
    message += " with value " + expectedValue;
}
message += ", got " + receivedType + " ";
// check if we need to specify received value
   if (isExplicable(receivedType)) {
    message += "with value " + receivedValue + ".";
}
return message
}

function styleValue (value, type) {
if (type === 'String') {
    return ("\"" + value + "\"")
} else if (type === 'Number') {
    return ("" + (Number(value)))
} else {
      return ("" + value)
  }
}

function isExplicable (value) {
    var explicitTypes = ['string', 'number', 'boolean'];
return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; })
}

function isBoolean () {
    var args = [], len = arguments.length;
    while ( len-- ) args[ len ] = arguments[ len ];

return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
}

/*  */

function handleError (err, vm, info) {
// Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
// See: https://github.com/vuejs/vuex/issues/1505
pushTarget();
try {
if (vm) {
    var cur = vm;
while ((cur = cur.$parent)) {
    var hooks = cur.$options.errorCaptured;
if (hooks) {
    for (var i = 0; i < hooks.length; i++) {
try {
    var capture = hooks[i].call(cur, err, vm, info) === false;
if (capture) { return }
} catch (e) {
globalHandleError(e, cur, 'errorCaptured hook');
}
}
}
}
}
globalHandleError(err, vm, info);
} finally {
  popTarget();
  }
}

function invokeWithErrorHandling (
handler,
context,
args,
vm,
info
) {
    var res;
try {
    res = args ? handler.apply(context, args) : handler.call(context);
if (res && !res._isVue && isPromise(res)) {
// issue #9511
// reassign to res to avoid catch triggering multiple times when nested calls
   res = res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
}
} catch (e) {
handleError(e, vm, info);
}
return res
}

function globalHandleError (err, vm, info) {
if (config.errorHandler) {
try {
    return config.errorHandler.call(null, err, vm, info)
} catch (e) {
// if the user intentionally throws the original error in the handler,
// do not log it twice
   if (e !== err) {
logError(e, null, 'config.errorHandler');
}
}
}
logError(err, vm, info);
}

function logError (err, vm, info) {
{
warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
}
/* istanbul ignore else */
if ((inBrowser || inWeex) && typeof console !== 'undefined') {
    console.error(err);
} else {
      throw err
  }
}

/*  */

var isUsingMicroTask = false;

var callbacks = [];
var pending = false;

function flushCallbacks () {
    pending = false;
    var copies = callbacks.slice(0);
    callbacks.length = 0;
    for (var i = 0; i < copies.length; i++) {
    copies[i]();
}
}

// Here we have async deferring wrappers using microtasks.
// In 2.5 we used (macro) tasks (in combination with microtasks).
// However, it has subtle problems when state is changed right before repaint
// (e.g. #6813, out-in transitions).
// Also, using (macro) tasks in event handler would cause some weird behaviors
// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
// So we now use microtasks everywhere, again.
// A major drawback of this tradeoff is that there are some scenarios
// where microtasks have too high a priority and fire in between supposedly
// sequential events (e.g. #4521, #6690, which have workarounds)
// or even between bubbling of the same event (#6566).
                                                     var timerFunc;

// The nextTick behavior leverages the microtask queue, which can be accessed
// via either native Promise.then or MutationObserver.
// MutationObserver has wider support, however it is seriously bugged in
// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
// completely stops working after triggering a few times... so, if native
// Promise is available, we will use it:
    /* istanbul ignore next, $flow-disable-line */
if (typeof Promise !== 'undefined' && isNative(Promise)) {
    var p = Promise.resolve();
timerFunc = function () {
    p.then(flushCallbacks);
// In problematic UIWebViews, Promise.then doesn't completely break, but
// it can get stuck in a weird state where callbacks are pushed into the
// microtask queue but the queue isn't being flushed, until the browser
// needs to do some other work, e.g. handle a timer. Therefore we can
// "force" the microtask queue to be flushed by adding an empty timer.
           if (isIOS) { setTimeout(noop); }
};
isUsingMicroTask = true;
} else if (!isIE && typeof MutationObserver !== 'undefined' && (
isNative(MutationObserver) ||
// PhantomJS and iOS 7.x
                      MutationObserver.toString() === '[object MutationObserverConstructor]'
)) {
// Use MutationObserver where native Promise is not available,
// e.g. PhantomJS, iOS7, Android 4.4
// (#6466 MutationObserver is unreliable in IE11)
var counter = 1;
    var observer = new MutationObserver(flushCallbacks);
    var textNode = document.createTextNode(String(counter));
observer.observe(textNode, {
                     characterData: true
                 });
timerFunc = function () {
    counter = (counter + 1) % 2;
    textNode.data = String(counter);
};
isUsingMicroTask = true;
} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
// Fallback to setImmediate.
// Techinically it leverages the (macro) task queue,
// but it is still a better choice than setTimeout.
   timerFunc = function () {
setImmediate(flushCallbacks);
};
} else {
// Fallback to setTimeout.
   timerFunc = function () {
setTimeout(flushCallbacks, 0);
};
}

function nextTick (cb, ctx) {
    var _resolve;
callbacks.push(function () {
if (cb) {
try {
    cb.call(ctx);
} catch (e) {
handleError(e, ctx, 'nextTick');
}
} else if (_resolve) {
_resolve(ctx);
}
});
if (!pending) {
    pending = true;
timerFunc();
}
// $flow-disable-line
    if (!cb && typeof Promise !== 'undefined') {
return new Promise(function (resolve) {
    _resolve = resolve;
})
}
}

/*  */

var mark;
var measure;

{
    var perf = inBrowser && window.performance;
/* istanbul ignore if */
if (
perf &&
perf.mark &&
perf.measure &&
perf.clearMarks &&
perf.clearMeasures
) {
mark = function (tag) { return perf.mark(tag); };
measure = function (name, startTag, endTag) {
    perf.measure(name, startTag, endTag);
    perf.clearMarks(startTag);
    perf.clearMarks(endTag);
// perf.clearMeasures(name)
};
}
}

/* not type checking this file because flow doesn't play well with Proxy */

var initProxy;

{
    var allowedGlobals = makeMap(
    'Infinity,undefined,NaN,isFinite,isNaN,' +
    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
    'require' // for Webpack/Browserify
    );

var warnNonPresent = function (target, key) {
warn(
"Property or method \"" + key + "\" is not defined on the instance but " +
'referenced during render. Make sure that this property is reactive, ' +
'either in the data option, or for class-based components, by ' +
'initializing the property. ' +
'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
target
);
};

var warnReservedPrefix = function (target, key) {
warn(
"Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
'prevent conflicts with Vue internals' +
'See: https://vuejs.org/v2/api/#data',
target
);
};

var hasProxy =
typeof Proxy !== 'undefined' && isNative(Proxy);

if (hasProxy) {
    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
config.keyCodes = new Proxy(config.keyCodes, {
set: function set (target, key, value) {
if (isBuiltInModifier(key)) {
warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
    return false
} else {
      target[key] = value;
      return true
  }
}
});
}

var hasHandler = {
has: function has (target, key) {
    var has = key in target;
    var isAllowed = allowedGlobals(key) ||
    (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
if (!has && !isAllowed) {
if (key in target.$data) { warnReservedPrefix(target, key); }
else { warnNonPresent(target, key); }
}
return has || !isAllowed
}
};

var getHandler = {
get: function get (target, key) {
if (typeof key === 'string' && !(key in target)) {
if (key in target.$data) { warnReservedPrefix(target, key); }
else { warnNonPresent(target, key); }
}
return target[key]
}
};

initProxy = function initProxy (vm) {
if (hasProxy) {
// determine which proxy handler to use
var options = vm.$options;
    var handlers = options.render && options.render._withStripped
    ? getHandler
: hasHandler;
    vm._renderProxy = new Proxy(vm, handlers);
} else {
      vm._renderProxy = vm;
  }
};
}

/*  */

var seenObjects = new _Set();

/**
   * Recursively traverse an object to evoke all converted
   * getters, so that every nested property inside the object
   * is collected as a "deep" dependency.
   */
function traverse (val) {
_traverse(val, seenObjects);
    seenObjects.clear();
}

function _traverse (val, seen) {
    var i, keys;
    var isA = Array.isArray(val);
if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
    return
}
if (val.__ob__) {
    var depId = val.__ob__.dep.id;
if (seen.has(depId)) {
    return
}
seen.add(depId);
}
if (isA) {
    i = val.length;
while (i--) { _traverse(val[i], seen); }
} else {
      keys = Object.keys(val);
      i = keys.length;
while (i--) { _traverse(val[keys[i]], seen); }
}
}

/*  */

var normalizeEvent = cached(function (name) {
    var passive = name.charAt(0) === '&';
    name = passive ? name.slice(1) : name;
    var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
name = once$$1 ? name.slice(1) : name;
    var capture = name.charAt(0) === '!';
    name = capture ? name.slice(1) : name;
return {
    name: name,
    once: once$$1,
    capture: capture,
    passive: passive
}
});

function createFnInvoker (fns, vm) {
function invoker () {
    var arguments$1 = arguments;

    var fns = invoker.fns;
if (Array.isArray(fns)) {
    var cloned = fns.slice();
    for (var i = 0; i < cloned.length; i++) {
invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
}
} else {
  // return handler return value for single handlers
  return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
  }
}
invoker.fns = fns;
return invoker
}

function updateListeners (
on,
oldOn,
add,
remove$$1,
createOnceHandler,
vm
) {
    var name, def$$1, cur, old, event;
for (name in on) {
    def$$1 = cur = on[name];
    old = oldOn[name];
    event = normalizeEvent(name);
if (isUndef(cur)) {
warn(
"Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
vm
);
} else if (isUndef(old)) {
if (isUndef(cur.fns)) {
    cur = on[name] = createFnInvoker(cur, vm);
}
if (isTrue(event.once)) {
    cur = on[name] = createOnceHandler(event.name, cur, event.capture);
}
add(event.name, cur, event.capture, event.passive, event.params);
} else if (cur !== old) {
    old.fns = cur;
    on[name] = old;
}
}
for (name in oldOn) {
if (isUndef(on[name])) {
    event = normalizeEvent(name);
    remove$$1(event.name, oldOn[name], event.capture);
}
}
}

/*  */

function mergeVNodeHook (def, hookKey, hook) {
if (def instanceof VNode) {
def = def.data.hook || (def.data.hook = {});
}
var invoker;
var oldHook = def[hookKey];

function wrappedHook () {
    hook.apply(this, arguments);
// important: remove merged hook to ensure it's called only once
// and prevent memory leak
remove(invoker.fns, wrappedHook);
}

if (isUndef(oldHook)) {
// no existing hook
invoker = createFnInvoker([wrappedHook]);
} else {
/* istanbul ignore if */
if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
// already a merged invoker
invoker = oldHook;
    invoker.fns.push(wrappedHook);
} else {
  // existing plain hook
  invoker = createFnInvoker([oldHook, wrappedHook]);
  }
}

invoker.merged = true;
def[hookKey] = invoker;
}

/*  */

function extractPropsFromVNodeData (
data,
Ctor,
tag
) {
// we are only extracting raw values here.
// validation and default values are handled in the child
// component itself.
var propOptions = Ctor.options.props;
if (isUndef(propOptions)) {
    return
}
var res = {};
var attrs = data.attrs;
var props = data.props;
if (isDef(attrs) || isDef(props)) {
for (var key in propOptions) {
    var altKey = hyphenate(key);
{
    var keyInLowerCase = key.toLowerCase();
if (
key !== keyInLowerCase &&
attrs && hasOwn(attrs, keyInLowerCase)
) {
tip(
"Prop \"" + keyInLowerCase + "\" is passed to component " +
(formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
" \"" + key + "\". " +
"Note that HTML attributes are case-insensitive and camelCased " +
"props need to use their kebab-case equivalents when using in-DOM " +
"templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
);
}
}
checkProp(res, props, key, altKey, true) ||
checkProp(res, attrs, key, altKey, false);
}
}
return res
}

function checkProp (
res,
hash,
key,
altKey,
preserve
) {
if (isDef(hash)) {
if (hasOwn(hash, key)) {
    res[key] = hash[key];
if (!preserve) {
    delete hash[key];
}
return true
} else if (hasOwn(hash, altKey)) {
    res[key] = hash[altKey];
if (!preserve) {
    delete hash[altKey];
}
return true
}
}
return false
}

/*  */

// The template compiler attempts to minimize the need for normalization by
// statically analyzing the template at compile time.
//
// For plain HTML markup, normalization can be completely skipped because the
// generated render function is guaranteed to return Array<VNode>. There are
// two cases where extra normalization is needed:

// 1. When the children contains components - because a functional component
// may return an Array instead of a single root. In this case, just a simple
// normalization is needed - if any child is an Array, we flatten the whole
// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
// because functional components already normalize their own children.
   function simpleNormalizeChildren (children) {
    for (var i = 0; i < children.length; i++) {
if (Array.isArray(children[i])) {
    return Array.prototype.concat.apply([], children)
}
}
return children
}

// 2. When the children contains constructs that always generated nested Arrays,
// e.g. <template>, <slot>, v-for, or when the children is provided by user
// with hand-written render functions / JSX. In such cases a full normalization
// is needed to cater to all possible types of children values.
   function normalizeChildren (children) {
    return isPrimitive(children)
    ? [createTextVNode(children)]
    : Array.isArray(children)
    ? normalizeArrayChildren(children)
: undefined
}

function isTextNode (node) {
    return isDef(node) && isDef(node.text) && isFalse(node.isComment)
}

function normalizeArrayChildren (children, nestedIndex) {
    var res = [];
    var i, c, lastIndex, last;
    for (i = 0; i < children.length; i++) {
    c = children[i];
if (isUndef(c) || typeof c === 'boolean') { continue }
lastIndex = res.length - 1;
last = res[lastIndex];
//  nested
    if (Array.isArray(c)) {
if (c.length > 0) {
    c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
// merge adjacent text nodes
   if (isTextNode(c[0]) && isTextNode(last)) {
    res[lastIndex] = createTextVNode(last.text + (c[0]).text);
    c.shift();
}
res.push.apply(res, c);
}
} else if (isPrimitive(c)) {
if (isTextNode(last)) {
// merge adjacent text nodes
// this is necessary for SSR hydration because text nodes are
// essentially merged when rendered to HTML strings
res[lastIndex] = createTextVNode(last.text + c);
} else if (c !== '') {
// convert primitive to vnode
res.push(createTextVNode(c));
}
} else {
if (isTextNode(c) && isTextNode(last)) {
// merge adjacent text nodes
res[lastIndex] = createTextVNode(last.text + c.text);
} else {
// default key for nested array children (likely generated by v-for)
if (isTrue(children._isVList) &&
isDef(c.tag) &&
isUndef(c.key) &&
isDef(nestedIndex)) {
    c.key = "__vlist" + nestedIndex + "_" + i + "__";
}
res.push(c);
}
}
}
return res
}

/*  */

function initProvide (vm) {
    var provide = vm.$options.provide;
if (provide) {
    vm._provided = typeof provide === 'function'
    ? provide.call(vm)
: provide;
}
}

function initInjections (vm) {
    var result = resolveInject(vm.$options.inject, vm);
if (result) {
toggleObserving(false);
Object.keys(result).forEach(function (key) {
/* istanbul ignore else */
{
defineReactive$$1(vm, key, result[key], function () {
warn(
"Avoid mutating an injected value directly since the changes will be " +
"overwritten whenever the provided component re-renders. " +
"injection being mutated: \"" + key + "\"",
vm
);
});
}
});
toggleObserving(true);
}
}

function resolveInject (inject, vm) {
if (inject) {
// inject is :any because flow is not smart enough to figure out cached
var result = Object.create(null);
    var keys = hasSymbol
    ? Reflect.ownKeys(inject)
: Object.keys(inject);

    for (var i = 0; i < keys.length; i++) {
    var key = keys[i];
// #6574 in case the inject object is observed...
   if (key === '__ob__') { continue }
var provideKey = inject[key].from;
var source = vm;
while (source) {
if (source._provided && hasOwn(source._provided, provideKey)) {
    result[key] = source._provided[provideKey];
    break
}
source = source.$parent;
}
if (!source) {
if ('default' in inject[key]) {
    var provideDefault = inject[key].default;
    result[key] = typeof provideDefault === 'function'
    ? provideDefault.call(vm)
: provideDefault;
} else {
  warn(("Injection \"" + key + "\" not found"), vm);
  }
}
}
return result
}
}

/*  */



/**
   * Runtime helper for resolving raw children VNodes into a slot object.
   */
function resolveSlots (
children,
context
) {
if (!children || !children.length) {
return {}
}
var slots = {};
for (var i = 0, l = children.length; i < l; i++) {
    var child = children[i];
    var data = child.data;
// remove slot attribute if the node is resolved as a Vue slot node
   if (data && data.attrs && data.attrs.slot) {
    delete data.attrs.slot;
}
// named slots should only be respected if the vnode was rendered in the
// same context.
   if ((child.context === context || child.fnContext === context) &&
data && data.slot != null
) {
    var name = data.slot;
    var slot = (slots[name] || (slots[name] = []));
if (child.tag === 'template') {
    slot.push.apply(slot, child.children || []);
} else {
      slot.push(child);
  }
} else {
  (slots.default || (slots.default = [])).push(child);
  }
}
// ignore slots that contains only whitespace
   for (var name$1 in slots) {
if (slots[name$1].every(isWhitespace)) {
    delete slots[name$1];
}
}
return slots
}

function isWhitespace (node) {
    return (node.isComment && !node.asyncFactory) || node.text === ' '
}

/*  */

function normalizeScopedSlots (
slots,
normalSlots,
prevSlots
) {
    var res;
    var isStable = slots ? !!slots.$stable : true;
    var key = slots && slots.$key;
if (!slots) {
res = {};
} else if (slots._normalized) {
// fast path 1: child component re-render only, parent did not change
return slots._normalized
} else if (
isStable &&
prevSlots &&
prevSlots !== emptyObject &&
key === prevSlots.$key &&
Object.keys(normalSlots).length === 0
) {
// fast path 2: stable scoped slots w/ no normal slots to proxy,
// only need to normalize once
return prevSlots
} else {
res = {};
for (var key$1 in slots) {
if (slots[key$1] && key$1[0] !== '$') {
    res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
}
}
}
// expose normal slots on scopedSlots
   for (var key$2 in normalSlots) {
if (!(key$2 in res)) {
    res[key$2] = proxyNormalSlot(normalSlots, key$2);
}
}
// avoriaz seems to mock a non-extensible $scopedSlots object
// and when that is passed down this would cause an error
   if (slots && Object.isExtensible(slots)) {
(slots)._normalized = res;
}
def(res, '$stable', isStable);
def(res, '$key', key);
return res
}

function normalizeScopedSlot(normalSlots, key, fn) {
var normalized = function () {
var res = arguments.length ? fn.apply(null, arguments) : fn({});
res = res && typeof res === 'object' && !Array.isArray(res)
? [res] // single vnode
           : normalizeChildren(res);
return res && res.length === 0
? undefined
  : res
};
// this is a slot using the new v-slot syntax without scope. although it is
// compiled as a scoped slot, render fn users would expect it to be present
// on this.$slots because the usage is semantically a normal slot.
   if (fn.proxy) {
Object.defineProperty(normalSlots, key, {
                          get: normalized,
                          enumerable: true,
                          configurable: true
                      });
}
return normalized
}

function proxyNormalSlot(slots, key) {
return function () { return slots[key]; }
}

/*  */

/**
   * Runtime helper for rendering v-for lists.
   */
function renderList (
val,
render
) {
    var ret, i, l, keys, key;
if (Array.isArray(val) || typeof val === 'string') {
    ret = new Array(val.length);
    for (i = 0, l = val.length; i < l; i++) {
    ret[i] = render(val[i], i);
}
} else if (typeof val === 'number') {
    ret = new Array(val);
    for (i = 0; i < val; i++) {
    ret[i] = render(i + 1, i);
}
} else if (isObject(val)) {
if (hasSymbol && val[Symbol.iterator]) {
    ret = [];
    var iterator = val[Symbol.iterator]();
    var result = iterator.next();
while (!result.done) {
    ret.push(render(result.value, ret.length));
    result = iterator.next();
}
} else {
      keys = Object.keys(val);
      ret = new Array(keys.length);
      for (i = 0, l = keys.length; i < l; i++) {
    key = keys[i];
    ret[i] = render(val[key], key, i);
}
}
}
if (!isDef(ret)) {
    ret = [];
}
(ret)._isVList = true;
return ret
}

/*  */

/**
   * Runtime helper for rendering <slot>
   */
function renderSlot (
name,
fallback,
props,
bindObject
) {
    var scopedSlotFn = this.$scopedSlots[name];
    var nodes;
if (scopedSlotFn) { // scoped slot
                       props = props || {};
if (bindObject) {
if (!isObject(bindObject)) {
warn(
'slot v-bind without argument expects an Object',
this
);
}
props = extend(extend({}, bindObject), props);
}
nodes = scopedSlotFn(props) || fallback;
} else {
      nodes = this.$slots[name] || fallback;
  }

var target = props && props.slot;
if (target) {
return this.$createElement('template', { slot: target }, nodes)
} else {
      return nodes
  }
}

/*  */

/**
   * Runtime helper for resolving filters
   */
function resolveFilter (id) {
    return resolveAsset(this.$options, 'filters', id, true) || identity
}

/*  */

function isKeyNotMatch (expect, actual) {
if (Array.isArray(expect)) {
    return expect.indexOf(actual) === -1
} else {
      return expect !== actual
  }
}

/**
   * Runtime helper for checking keyCodes from config.
   * exposed as Vue.prototype._k
   * passing in eventKeyName as last argument separately for backwards compat
   */
function checkKeyCodes (
eventKeyCode,
key,
builtInKeyCode,
eventKeyName,
builtInKeyName
) {
    var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
    return isKeyNotMatch(builtInKeyName, eventKeyName)
} else if (mappedKeyCode) {
    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
} else if (eventKeyName) {
    return hyphenate(eventKeyName) !== key
}
}

/*  */

/**
   * Runtime helper for merging v-bind="object" into a VNode's data.
   */
function bindObjectProps (
data,
tag,
value,
asProp,
isSync
) {
if (value) {
if (!isObject(value)) {
warn(
'v-bind without argument expects an Object or Array value',
this
);
} else {
if (Array.isArray(value)) {
    value = toObject(value);
}
var hash;
var loop = function ( key ) {
if (
key === 'class' ||
            key === 'style' ||
isReservedAttribute(key)
) {
    hash = data;
} else {
      var type = data.attrs && data.attrs.type;
hash = asProp || config.mustUseProp(tag, type, key)
? data.domProps || (data.domProps = {})
: data.attrs || (data.attrs = {});
}
var camelizedKey = camelize(key);
if (!(key in hash) && !(camelizedKey in hash)) {
    hash[key] = value[key];

if (isSync) {
var on = data.on || (data.on = {});
on[("update:" + camelizedKey)] = function ($event) {
    value[key] = $event;
};
}
}
};

for (var key in value) loop( key );
}
}
return data
}

/*  */

/**
   * Runtime helper for rendering static trees.
   */
function renderStatic (
index,
isInFor
) {
    var cached = this._staticTrees || (this._staticTrees = []);
    var tree = cached[index];
// if has already-rendered static tree and not inside v-for,
// we can reuse the same tree.
   if (tree && !isInFor) {
    return tree
}
// otherwise, render a fresh tree.
tree = cached[index] = this.$options.staticRenderFns[index].call(
this._renderProxy,
null,
this // for render fns generated for functional component templates
);
markStatic(tree, ("__static__" + index), false);
return tree
}

/**
   * Runtime helper for v-once.
   * Effectively it means marking the node as static with a unique key.
   */
function markOnce (
tree,
index,
key
) {
markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
    return tree
}

function markStatic (
tree,
key,
isOnce
) {
if (Array.isArray(tree)) {
    for (var i = 0; i < tree.length; i++) {
if (tree[i] && typeof tree[i] !== 'string') {
markStaticNode(tree[i], (key + "_" + i), isOnce);
}
}
} else {
  markStaticNode(tree, key, isOnce);
  }
}

function markStaticNode (node, key, isOnce) {
    node.isStatic = true;
    node.key = key;
    node.isOnce = isOnce;
}

/*  */

function bindObjectListeners (data, value) {
if (value) {
if (!isPlainObject(value)) {
warn(
'v-on without argument expects an Object value',
this
);
} else {
var on = data.on = data.on ? extend({}, data.on) : {};
for (var key in value) {
    var existing = on[key];
    var ours = value[key];
    on[key] = existing ? [].concat(existing, ours) : ours;
}
}
}
return data
}

/*  */

function resolveScopedSlots (
fns, // see flow/vnode
                 res,
// the following are added in 2.6
hasDynamicKeys,
contentHashKey
) {
res = res || { $stable: !hasDynamicKeys };
for (var i = 0; i < fns.length; i++) {
    var slot = fns[i];
if (Array.isArray(slot)) {
resolveScopedSlots(slot, res, hasDynamicKeys);
} else if (slot) {
// marker for reverse proxying v-slot without scope on this.$slots
   if (slot.proxy) {
    slot.fn.proxy = true;
}
res[slot.key] = slot.fn;
}
}
if (contentHashKey) {
(res).$key = contentHashKey;
}
return res
}

/*  */

function bindDynamicKeys (baseObj, values) {
    for (var i = 0; i < values.length; i += 2) {
    var key = values[i];
if (typeof key === 'string' && key) {
    baseObj[values[i]] = values[i + 1];
} else if (key !== '' && key !== null) {
// null is a speical value for explicitly removing a binding
warn(
("Invalid value for dynamic directive argument (expected string or null): " + key),
this
);
}
}
return baseObj
}

// helper to dynamically append modifier runtime markers to event names.
// ensure only append when value is already string, otherwise it will be cast
// to string and cause the type check to miss.
   function prependModifier (value, symbol) {
    return typeof value === 'string' ? symbol + value : value
}

/*  */

function installRenderHelpers (target) {
    target._o = markOnce;
    target._n = toNumber;
    target._s = toString;
    target._l = renderList;
    target._t = renderSlot;
    target._q = looseEqual;
    target._i = looseIndexOf;
    target._m = renderStatic;
    target._f = resolveFilter;
    target._k = checkKeyCodes;
    target._b = bindObjectProps;
    target._v = createTextVNode;
    target._e = createEmptyVNode;
    target._u = resolveScopedSlots;
    target._g = bindObjectListeners;
    target._d = bindDynamicKeys;
    target._p = prependModifier;
}

/*  */

function FunctionalRenderContext (
data,
props,
children,
parent,
Ctor
) {
    var this$1 = this;

    var options = Ctor.options;
// ensure the createElement function in functional components
// gets a unique context - this is necessary for correct named slot check
var contextVm;
if (hasOwn(parent, '_uid')) {
    contextVm = Object.create(parent);
// $flow-disable-line
contextVm._original = parent;
} else {
  // the context vm passed in is a functional context as well.
  // in this case we want to make sure we are able to get a hold to the
  // real context instance.
  contextVm = parent;
  // $flow-disable-line
  parent = parent._original;
  }
var isCompiled = isTrue(options._compiled);
var needNormalization = !isCompiled;

this.data = data;
this.props = props;
this.children = children;
this.parent = parent;
this.listeners = data.on || emptyObject;
this.injections = resolveInject(options.inject, parent);
this.slots = function () {
if (!this$1.$slots) {
normalizeScopedSlots(
data.scopedSlots,
this$1.$slots = resolveSlots(children, parent)
);
}
return this$1.$slots
};

Object.defineProperty(this, 'scopedSlots', ({
enumerable: true,
get: function get () {
    return normalizeScopedSlots(data.scopedSlots, this.slots())
}
}));

// support for compiled functional template
   if (isCompiled) {
// exposing $options for renderStatic()
this.$options = options;
// pre-resolve slots for renderSlot()
this.$slots = this.slots();
    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
}

if (options._scopeId) {
this._c = function (a, b, c, d) {
    var vnode = createElement(contextVm, a, b, c, d, needNormalization);
if (vnode && !Array.isArray(vnode)) {
    vnode.fnScopeId = options._scopeId;
    vnode.fnContext = parent;
}
return vnode
};
} else {
this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
}
}

installRenderHelpers(FunctionalRenderContext.prototype);

function createFunctionalComponent (
Ctor,
propsData,
data,
contextVm,
children
) {
    var options = Ctor.options;
var props = {};
var propOptions = options.props;
if (isDef(propOptions)) {
for (var key in propOptions) {
    props[key] = validateProp(key, propOptions, propsData || emptyObject);
}
} else {
if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
if (isDef(data.props)) { mergeProps(props, data.props); }
}

var renderContext = new FunctionalRenderContext(
data,
props,
children,
contextVm,
Ctor
);

var vnode = options.render.call(null, renderContext._c, renderContext);

if (vnode instanceof VNode) {
    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
} else if (Array.isArray(vnode)) {
    var vnodes = normalizeChildren(vnode) || [];
    var res = new Array(vnodes.length);
    for (var i = 0; i < vnodes.length; i++) {
    res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
}
return res
}
}

function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
// #7817 clone node before setting fnContext, otherwise if the node is reused
// (e.g. it was from a cached normal slot) the fnContext causes named slots
// that should not be matched to match.
var clone = cloneVNode(vnode);
    clone.fnContext = contextVm;
    clone.fnOptions = options;
{
(clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
}
if (data.slot) {
(clone.data || (clone.data = {})).slot = data.slot;
}
return clone
}

function mergeProps (to, from) {
for (var key in from) {
    to[camelize(key)] = from[key];
}
}

/*  */

/*  */

/*  */

/*  */

// inline hooks to be invoked on component VNodes during patch
   var componentVNodeHooks = {
init: function init (vnode, hydrating) {
if (
vnode.componentInstance &&
!vnode.componentInstance._isDestroyed &&
vnode.data.keepAlive
) {
// kept-alive components, treat as a patch
var mountedNode = vnode; // work around flow
componentVNodeHooks.prepatch(mountedNode, mountedNode);
} else {
      var child = vnode.componentInstance = createComponentInstanceForVnode(
              vnode,
              activeInstance
      );
      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
  }
},

prepatch: function prepatch (oldVnode, vnode) {
    var options = vnode.componentOptions;
    var child = vnode.componentInstance = oldVnode.componentInstance;
updateChildComponent(
child,
options.propsData, // updated props
options.listeners, // updated listeners
vnode, // new parent vnode
options.children // new children
);
},

insert: function insert (vnode) {
    var context = vnode.context;
    var componentInstance = vnode.componentInstance;
if (!componentInstance._isMounted) {
    componentInstance._isMounted = true;
callHook(componentInstance, 'mounted');
}
if (vnode.data.keepAlive) {
if (context._isMounted) {
// vue-router#1212
// During updates, a kept-alive component's child components may
// change, so directly walking the tree here may call activated hooks
// on incorrect children. Instead we push them into a queue which will
// be processed after the whole patch process ended.
queueActivatedComponent(componentInstance);
} else {
  activateChildComponent(componentInstance, true /* direct */);
  }
}
},

destroy: function destroy (vnode) {
    var componentInstance = vnode.componentInstance;
if (!componentInstance._isDestroyed) {
if (!vnode.data.keepAlive) {
    componentInstance.$destroy();
} else {
  deactivateChildComponent(componentInstance, true /* direct */);
  }
}
}
};

var hooksToMerge = Object.keys(componentVNodeHooks);

function createComponent (
Ctor,
data,
context,
children,
tag
) {
if (isUndef(Ctor)) {
    return
}

var baseCtor = context.$options._base;

// plain options object: turn it into a constructor
   if (isObject(Ctor)) {
    Ctor = baseCtor.extend(Ctor);
}

// if at this stage it's not a constructor or an async component factory,
// reject.
   if (typeof Ctor !== 'function') {
{
warn(("Invalid Component definition: " + (String(Ctor))), context);
}
return
}

// async component
   var asyncFactory;
if (isUndef(Ctor.cid)) {
    asyncFactory = Ctor;
    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
if (Ctor === undefined) {
// return a placeholder node for async component, which is rendered
// as a comment node but preserves all the raw information for the node.
// the information will be used for async server-rendering and hydration.
return createAsyncPlaceholder(
asyncFactory,
data,
context,
children,
tag
)
}
}

data = data || {};

// resolve constructor options in case global mixins are applied after
// component constructor creation
resolveConstructorOptions(Ctor);

// transform component v-model data into props & events
   if (isDef(data.model)) {
transformModel(Ctor.options, data);
}

// extract props
   var propsData = extractPropsFromVNodeData(data, Ctor, tag);

// functional component
   if (isTrue(Ctor.options.functional)) {
    return createFunctionalComponent(Ctor, propsData, data, context, children)
}

// extract listeners, since these needs to be treated as
// child component listeners instead of DOM listeners
   var listeners = data.on;
// replace with listeners with .native modifier
// so it gets processed during parent component patch.
   data.on = data.nativeOn;

if (isTrue(Ctor.options.abstract)) {
// abstract components do not keep anything
// other than props & listeners & slot

// work around flow
var slot = data.slot;
data = {};
if (slot) {
    data.slot = slot;
}
}

// install component management hooks onto the placeholder node
installComponentHooks(data);

// return a placeholder vnode
   var name = Ctor.options.name || tag;
var vnode = new VNode(
("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
data, undefined, undefined, undefined, context,
{ Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
asyncFactory
);

return vnode
}

function createComponentInstanceForVnode (
vnode, // we know it's MountedComponentVNode but flow doesn't
                                                            parent // activeInstance in lifecycle state
) {
var options = {
    _isComponent: true,
    _parentVnode: vnode,
    parent: parent
};
// check inline-template render functions
   var inlineTemplate = vnode.data.inlineTemplate;
if (isDef(inlineTemplate)) {
    options.render = inlineTemplate.render;
    options.staticRenderFns = inlineTemplate.staticRenderFns;
}
return new vnode.componentOptions.Ctor(options)
}

function installComponentHooks (data) {
var hooks = data.hook || (data.hook = {});
for (var i = 0; i < hooksToMerge.length; i++) {
    var key = hooksToMerge[i];
    var existing = hooks[key];
    var toMerge = componentVNodeHooks[key];
if (existing !== toMerge && !(existing && existing._merged)) {
    hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
}
}
}

function mergeHook$1 (f1, f2) {
var merged = function (a, b) {
// flow complains about extra args which is why we use any
f1(a, b);
f2(a, b);
};
merged._merged = true;
return merged
}

// transform component v-model info (value and callback) into
// prop and event handler respectively.
   function transformModel (options, data) {
    var prop = (options.model && options.model.prop) || 'value';
    var event = (options.model && options.model.event) || 'input'
;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
var on = data.on || (data.on = {});
var existing = on[event];
var callback = data.model.callback;
if (isDef(existing)) {
if (
Array.isArray(existing)
? existing.indexOf(callback) === -1
: existing !== callback
) {
    on[event] = [callback].concat(existing);
}
} else {
      on[event] = callback;
  }
}

/*  */

var SIMPLE_NORMALIZE = 1;
var ALWAYS_NORMALIZE = 2;

// wrapper function for providing a more flexible interface
// without getting yelled at by flow
   function createElement (
context,
tag,
data,
children,
normalizationType,
alwaysNormalize
) {
if (Array.isArray(data) || isPrimitive(data)) {
    normalizationType = children;
    children = data;
    data = undefined;
}
if (isTrue(alwaysNormalize)) {
    normalizationType = ALWAYS_NORMALIZE;
}
return _createElement(context, tag, data, children, normalizationType)
}

function _createElement (
context,
tag,
data,
children,
normalizationType
) {
if (isDef(data) && isDef((data).__ob__)) {
warn(
"Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
'Always create fresh vnode data objects in each render!',
context
);
    return createEmptyVNode()
}
// object syntax in v-bind
   if (isDef(data) && isDef(data.is)) {
    tag = data.is;
}
if (!tag) {
// in case of component :is set to falsy value
return createEmptyVNode()
}
// warn against non-primitive key
   if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
) {
{
warn(
'Avoid using non-primitive value as key, ' +
'use string/number value instead.',
context
);
}
}
// support single function children as default scoped slot
   if (Array.isArray(children) &&
typeof children[0] === 'function'
) {
data = data || {};
data.scopedSlots = { default: children[0] };
children.length = 0;
}
if (normalizationType === ALWAYS_NORMALIZE) {
    children = normalizeChildren(children);
} else if (normalizationType === SIMPLE_NORMALIZE) {
    children = simpleNormalizeChildren(children);
}
var vnode, ns;
if (typeof tag === 'string') {
    var Ctor;
    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
if (config.isReservedTag(tag)) {
// platform built-in elements
vnode = new VNode(
config.parsePlatformTagName(tag), data, children,
undefined, undefined, context
);
} else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
// component
vnode = createComponent(Ctor, data, context, children, tag);
} else {
  // unknown or unlisted namespaced elements
  // check at runtime because it may get assigned a namespace when its
  // parent normalizes children
  vnode = new VNode(
  tag, data, children,
  undefined, undefined, context
  );
  }
} else {
  // direct component options / constructor
  vnode = createComponent(tag, data, context, children);
  }
if (Array.isArray(vnode)) {
    return vnode
} else if (isDef(vnode)) {
if (isDef(ns)) { applyNS(vnode, ns); }
if (isDef(data)) { registerDeepBindings(data); }
return vnode
} else {
      return createEmptyVNode()
  }
}

function applyNS (vnode, ns, force) {
    vnode.ns = ns;
if (vnode.tag === 'foreignObject') {
// use default namespace inside foreignObject
ns = undefined;
    force = true;
}
if (isDef(vnode.children)) {
    for (var i = 0, l = vnode.children.length; i < l; i++) {
    var child = vnode.children[i];
if (isDef(child.tag) && (
isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
applyNS(child, ns, force);
}
}
}
}

// ref #5318
// necessary to ensure parent re-render when deep bindings like :style and
// :class are used on slot nodes
   function registerDeepBindings (data) {
if (isObject(data.style)) {
traverse(data.style);
}
if (isObject(data.class)) {
traverse(data.class);
}
}

/*  */

function initRender (vm) {
    vm._vnode = null; // the root of the child tree
vm._staticTrees = null; // v-once cached trees
var options = vm.$options;
    var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
var renderContext = parentVnode && parentVnode.context;
    vm.$slots = resolveSlots(options._renderChildren, renderContext);
    vm.$scopedSlots = emptyObject;
// bind the createElement fn to this instance
// so that we get proper render context inside it.
// args order: tag, data, children, normalizationType, alwaysNormalize
// internal version is used by render functions compiled from templates
   vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
// normalization is always applied for the public version, used in
// user-written render functions.
   vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };

// $attrs & $listeners are exposed for easier HOC creation.
// they need to be reactive so that HOCs using them are always updated
   var parentData = parentVnode && parentVnode.data;

/* istanbul ignore else */
{
defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
    !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
}, true);
defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
    !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
}, true);
}
}

var currentRenderingInstance = null;

function renderMixin (Vue) {
// install runtime convenience helpers
installRenderHelpers(Vue.prototype);

Vue.prototype.$nextTick = function (fn) {
    return nextTick(fn, this)
};

Vue.prototype._render = function () {
    var vm = this;
    var ref = vm.$options;
    var render = ref.render;
    var _parentVnode = ref._parentVnode;

if (_parentVnode) {
    vm.$scopedSlots = normalizeScopedSlots(
    _parentVnode.data.scopedSlots,
    vm.$slots,
    vm.$scopedSlots
    );
}

// set parent vnode. this allows render functions to have access
// to the data on the placeholder node.
   vm.$vnode = _parentVnode;
// render self
   var vnode;
try {
// There's no need to maintain a stack becaues all render fns are called
// separately from one another. Nested component's render fns are called
// when parent component is patched.
currentRenderingInstance = vm;
    vnode = render.call(vm._renderProxy, vm.$createElement);
} catch (e) {
handleError(e, vm, "render");
// return error render result,
// or previous vnode to prevent render error causing blank component
       /* istanbul ignore else */
   if (vm.$options.renderError) {
try {
    vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
} catch (e) {
handleError(e, vm, "renderError");
    vnode = vm._vnode;
}
} else {
      vnode = vm._vnode;
  }
} finally {
      currentRenderingInstance = null;
  }
// if the returned array contains only a single node, allow it
if (Array.isArray(vnode) && vnode.length === 1) {
    vnode = vnode[0];
}
// return empty vnode in case the render function errored out
   if (!(vnode instanceof VNode)) {
if (Array.isArray(vnode)) {
warn(
'Multiple root nodes returned from render function. Render function ' +
'should return a single root node.',
vm
);
}
vnode = createEmptyVNode();
}
// set parent
   vnode.parent = _parentVnode;
return vnode
};
}

/*  */

function ensureCtor (comp, base) {
if (
comp.__esModule ||
(hasSymbol && comp[Symbol.toStringTag] === 'Module')
) {
    comp = comp.default;
}
return isObject(comp)
? base.extend(comp)
: comp
}

function createAsyncPlaceholder (
factory,
data,
context,
children,
tag
) {
    var node = createEmptyVNode();
    node.asyncFactory = factory;
node.asyncMeta = { data: data, context: context, children: children, tag: tag };
return node
}

function resolveAsyncComponent (
factory,
baseCtor
) {
if (isTrue(factory.error) && isDef(factory.errorComp)) {
    return factory.errorComp
}

if (isDef(factory.resolved)) {
    return factory.resolved
}

var owner = currentRenderingInstance;
if (isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
// already pending
factory.owners.push(owner);
}

if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
    return factory.loadingComp
}

if (!isDef(factory.owners)) {
    var owners = factory.owners = [owner];
    var sync = true

;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });

var forceRender = function (renderCompleted) {
    for (var i = 0, l = owners.length; i < l; i++) {
(owners[i]).$forceUpdate();
}

if (renderCompleted) {
    owners.length = 0;
}
};

var resolve = once(function (res) {
// cache resolved
factory.resolved = ensureCtor(res, baseCtor);
// invoke callbacks only if this is not a synchronous resolve
// (async resolves are shimmed as synchronous during SSR)
if (!sync) {
forceRender(true);
} else {
      owners.length = 0;
  }
});

var reject = once(function (reason) {
warn(
"Failed to resolve async component: " + (String(factory)) +
(reason ? ("\nReason: " + reason) : '')
);
if (isDef(factory.errorComp)) {
    factory.error = true;
forceRender(true);
}
});

var res = factory(resolve, reject);

if (isObject(res)) {
if (isPromise(res)) {
// () => Promise
       if (isUndef(factory.resolved)) {
    res.then(resolve, reject);
}
} else if (isPromise(res.component)) {
    res.component.then(resolve, reject);

if (isDef(res.error)) {
    factory.errorComp = ensureCtor(res.error, baseCtor);
}

if (isDef(res.loading)) {
    factory.loadingComp = ensureCtor(res.loading, baseCtor);
if (res.delay === 0) {
    factory.loading = true;
} else {
setTimeout(function () {
if (isUndef(factory.resolved) && isUndef(factory.error)) {
    factory.loading = true;
forceRender(false);
}
}, res.delay || 200);
}
}

if (isDef(res.timeout)) {
setTimeout(function () {
if (isUndef(factory.resolved)) {
reject(
"timeout (" + (res.timeout) + "ms)"
);
}
}, res.timeout);
}
}
}

sync = false;
// return in case resolved synchronously
   return factory.loading
? factory.loadingComp
  : factory.resolved
}
}

/*  */

function isAsyncPlaceholder (node) {
    return node.isComment && node.asyncFactory
}

/*  */

function getFirstComponentChild (children) {
if (Array.isArray(children)) {
    for (var i = 0; i < children.length; i++) {
    var c = children[i];
if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
    return c
}
}
}
}

/*  */

/*  */

function initEvents (vm) {
    vm._events = Object.create(null);
    vm._hasHookEvent = false;
// init parent attached events
var listeners = vm.$options._parentListeners;
if (listeners) {
updateComponentListeners(vm, listeners);
}
}

var target;

function add (event, fn) {
    target.$on(event, fn);
}

function remove$1 (event, fn) {
    target.$off(event, fn);
}

function createOnceHandler (event, fn) {
    var _target = target;
return function onceHandler () {
    var res = fn.apply(null, arguments);
if (res !== null) {
    _target.$off(event, onceHandler);
}
}
}

function updateComponentListeners (
vm,
listeners,
oldListeners
) {
    target = vm;
updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
target = undefined;
}

function eventsMixin (Vue) {
    var hookRE = /^hook:/;
Vue.prototype.$on = function (event, fn) {
    var vm = this;
if (Array.isArray(event)) {
    for (var i = 0, l = event.length; i < l; i++) {
    vm.$on(event[i], fn);
}
} else {
  (vm._events[event] || (vm._events[event] = [])).push(fn);
// optimize hook:event cost by using a boolean flag marked at registration
// instead of a hash lookup
   if (hookRE.test(event)) {
    vm._hasHookEvent = true;
}
}
return vm
};

Vue.prototype.$once = function (event, fn) {
    var vm = this;
function on () {
    vm.$off(event, on);
    fn.apply(vm, arguments);
}
on.fn = fn;
vm.$on(event, on);
return vm
};

Vue.prototype.$off = function (event, fn) {
    var vm = this;
// all
   if (!arguments.length) {
    vm._events = Object.create(null);
    return vm
}
// array of events
   if (Array.isArray(event)) {
    for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
    vm.$off(event[i$1], fn);
}
return vm
}
// specific event
   var cbs = vm._events[event];
if (!cbs) {
    return vm
}
if (!fn) {
    vm._events[event] = null;
    return vm
}
// specific handler
   var cb;
var i = cbs.length;
while (i--) {
    cb = cbs[i];
if (cb === fn || cb.fn === fn) {
    cbs.splice(i, 1);
    break
}
}
return vm
};

Vue.prototype.$emit = function (event) {
    var vm = this;
{
    var lowerCaseEvent = event.toLowerCase();
if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
tip(
"Event \"" + lowerCaseEvent + "\" is emitted in component " +
(formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
"Note that HTML attributes are case-insensitive and you cannot use " +
"v-on to listen to camelCase events when using in-DOM templates. " +
"You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
);
}
}
var cbs = vm._events[event];
if (cbs) {
    cbs = cbs.length > 1 ? toArray(cbs) : cbs;
    var args = toArray(arguments, 1);
    var info = "event handler for \"" + event + "\"";
    for (var i = 0, l = cbs.length; i < l; i++) {
invokeWithErrorHandling(cbs[i], vm, args, vm, info);
}
}
return vm
};
}

/*  */

var activeInstance = null;
var isUpdatingChildComponent = false;

function setActiveInstance(vm) {
    var prevActiveInstance = activeInstance;
    activeInstance = vm;
return function () {
    activeInstance = prevActiveInstance;
}
}

function initLifecycle (vm) {
    var options = vm.$options;

// locate first non-abstract parent
var parent = options.parent;
if (parent && !options.abstract) {
while (parent.$options.abstract && parent.$parent) {
    parent = parent.$parent;
}
parent.$children.push(vm);
}

vm.$parent = parent;
vm.$root = parent ? parent.$root : vm;

vm.$children = [];
vm.$refs = {};

vm._watcher = null;
vm._inactive = null;
vm._directInactive = false;
vm._isMounted = false;
vm._isDestroyed = false;
vm._isBeingDestroyed = false;
}

function lifecycleMixin (Vue) {
Vue.prototype._update = function (vnode, hydrating) {
    var vm = this;
    var prevEl = vm.$el;
    var prevVnode = vm._vnode;
    var restoreActiveInstance = setActiveInstance(vm);
    vm._vnode = vnode;
// Vue.prototype.__patch__ is injected in entry points
// based on the rendering backend used.
   if (!prevVnode) {
// initial render
vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
} else {
  // updates
  vm.$el = vm.__patch__(prevVnode, vnode);
  }
restoreActiveInstance();
// update __vue__ reference
   if (prevEl) {
    prevEl.__vue__ = null;
}
if (vm.$el) {
    vm.$el.__vue__ = vm;
}
// if parent is an HOC, update its $el as well
if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
    vm.$parent.$el = vm.$el;
}
// updated hook is called by the scheduler to ensure that children are
// updated in a parent's updated hook.
};

Vue.prototype.$forceUpdate = function () {
    var vm = this;
if (vm._watcher) {
    vm._watcher.update();
}
};

Vue.prototype.$destroy = function () {
    var vm = this;
if (vm._isBeingDestroyed) {
    return
}
callHook(vm, 'beforeDestroy');
vm._isBeingDestroyed = true;
// remove self from parent
   var parent = vm.$parent;
if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
remove(parent.$children, vm);
}
// teardown watchers
   if (vm._watcher) {
    vm._watcher.teardown();
}
var i = vm._watchers.length;
while (i--) {
    vm._watchers[i].teardown();
}
// remove reference from data ob
// frozen object may not have observer.
   if (vm._data.__ob__) {
    vm._data.__ob__.vmCount--;
}
// call the last hook...
   vm._isDestroyed = true;
// invoke destroy hooks on current rendered tree
   vm.__patch__(vm._vnode, null);
// fire destroyed hook
callHook(vm, 'destroyed');
// turn off all instance listeners.
   vm.$off();
// remove __vue__ reference
   if (vm.$el) {
    vm.$el.__vue__ = null;
}
// release circular reference (#6759)
if (vm.$vnode) {
    vm.$vnode.parent = null;
}
};
}

function mountComponent (
vm,
el,
hydrating
) {
    vm.$el = el;
if (!vm.$options.render) {
    vm.$options.render = createEmptyVNode;
{
/* istanbul ignore if */
if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
          vm.$options.el || el) {
warn(
'You are using the runtime-only build of Vue where the template ' +
'compiler is not available. Either pre-compile the templates into ' +
'render functions, or use the compiler-included build.',
vm
);
} else {
  warn(
  'Failed to mount component: template or render function not defined.',
  vm
  );
  }
}
}
callHook(vm, 'beforeMount');

var updateComponent;
/* istanbul ignore if */
if (config.performance && mark) {
updateComponent = function () {
    var name = vm._name;
    var id = vm._uid;
    var startTag = "vue-perf-start:" + id;
    var endTag = "vue-perf-end:" + id;

mark(startTag);
    var vnode = vm._render();
mark(endTag);
measure(("vue " + name + " render"), startTag, endTag);

mark(startTag);
    vm._update(vnode, hydrating);
mark(endTag);
measure(("vue " + name + " patch"), startTag, endTag);
};
} else {
updateComponent = function () {
    vm._update(vm._render(), hydrating);
};
}

// we set this to vm._watcher inside the watcher's constructor
// since the watcher's initial patch may call $forceUpdate (e.g. inside child
// component's mounted hook), which relies on vm._watcher being already defined
new Watcher(vm, updateComponent, noop, {
before: function before () {
if (vm._isMounted && !vm._isDestroyed) {
callHook(vm, 'beforeUpdate');
}
}
}, true /* isRenderWatcher */);
hydrating = false;

// manually mounted instance, call mounted on self
// mounted is called for render-created child components in its inserted hook
   if (vm.$vnode == null) {
    vm._isMounted = true;
callHook(vm, 'mounted');
}
return vm
}

function updateChildComponent (
vm,
propsData,
listeners,
parentVnode,
renderChildren
) {
{
    isUpdatingChildComponent = true;
}

// determine whether component has slot children
// we need to do this before overwriting $options._renderChildren.

// check if there are dynamic scopedSlots (hand-written or compiled but with
// dynamic slot names). Static scoped slots compiled from template has the
// "$stable" marker.
             var newScopedSlots = parentVnode.data.scopedSlots;
var oldScopedSlots = vm.$scopedSlots;
var hasDynamicScopedSlot = !!(
(newScopedSlots && !newScopedSlots.$stable) ||
(oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
(newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key)
);

// Any static slot children from the parent may have changed during parent's
// update. Dynamic scoped slots may also have changed. In such cases, a forced
// update is necessary to ensure correctness.
   var needsForceUpdate = !!(
renderChildren ||               // has new static slots
                                   vm.$options._renderChildren ||  // has old static slots
                                                                      hasDynamicScopedSlot
);

vm.$options._parentVnode = parentVnode;
vm.$vnode = parentVnode; // update vm's placeholder node without re-render

if (vm._vnode) { // update child tree's parent
vm._vnode.parent = parentVnode;
}
vm.$options._renderChildren = renderChildren;

// update $attrs and $listeners hash
// these are also reactive so they may trigger child update if the child
// used them during render
   vm.$attrs = parentVnode.data.attrs || emptyObject;
vm.$listeners = listeners || emptyObject;

// update props
   if (propsData && vm.$options.props) {
toggleObserving(false);
    var props = vm._props;
    var propKeys = vm.$options._propKeys || [];
    for (var i = 0; i < propKeys.length; i++) {
    var key = propKeys[i];
    var propOptions = vm.$options.props; // wtf flow?
props[key] = validateProp(key, propOptions, propsData, vm);
}
toggleObserving(true);
// keep a copy of raw propsData
   vm.$options.propsData = propsData;
}

// update listeners
   listeners = listeners || emptyObject;
var oldListeners = vm.$options._parentListeners;
vm.$options._parentListeners = listeners;
updateComponentListeners(vm, listeners, oldListeners);

// resolve slots + force update if has children
   if (needsForceUpdate) {
    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
    vm.$forceUpdate();
}

{
    isUpdatingChildComponent = false;
}
}

function isInInactiveTree (vm) {
while (vm && (vm = vm.$parent)) {
if (vm._inactive) { return true }
}
return false
}

function activateChildComponent (vm, direct) {
if (direct) {
    vm._directInactive = false;
if (isInInactiveTree(vm)) {
    return
}
} else if (vm._directInactive) {
    return
}
if (vm._inactive || vm._inactive === null) {
    vm._inactive = false;
    for (var i = 0; i < vm.$children.length; i++) {
activateChildComponent(vm.$children[i]);
}
callHook(vm, 'activated');
}
}

function deactivateChildComponent (vm, direct) {
if (direct) {
    vm._directInactive = true;
if (isInInactiveTree(vm)) {
    return
}
}
if (!vm._inactive) {
    vm._inactive = true;
    for (var i = 0; i < vm.$children.length; i++) {
deactivateChildComponent(vm.$children[i]);
}
callHook(vm, 'deactivated');
}
}

function callHook (vm, hook) {
// #7573 disable dep collection when invoking lifecycle hooks
pushTarget();
    var handlers = vm.$options[hook];
    var info = hook + " hook";
if (handlers) {
    for (var i = 0, j = handlers.length; i < j; i++) {
invokeWithErrorHandling(handlers[i], vm, null, vm, info);
}
}
if (vm._hasHookEvent) {
    vm.$emit('hook:' + hook);
}
popTarget();
}

/*  */

var MAX_UPDATE_COUNT = 100;

var queue = [];
var activatedChildren = [];
var has = {};
var circular = {};
var waiting = false;
var flushing = false;
var index = 0;

/**
   * Reset the scheduler's state.
   */
function resetSchedulerState () {
    index = queue.length = activatedChildren.length = 0;
has = {};
{
circular = {};
}
waiting = flushing = false;
}

// Async edge case #6566 requires saving the timestamp when event listeners are
// attached. However, calling performance.now() has a perf overhead especially
// if the page has thousands of event listeners. Instead, we take a timestamp
// every time the scheduler flushes and use that for all event listeners
// attached during that flush.
   var currentFlushTimestamp = 0;

// Async edge case fix requires storing an event listener's attach timestamp.
var getNow = Date.now;

// Determine what event timestamp the browser is using. Annoyingly, the
// timestamp can either be hi-res (relative to page load) or low-res
// (relative to UNIX epoch), so in order to compare time we have to use the
// same timestamp type when saving the flush timestamp.
   if (inBrowser && getNow() > document.createEvent('Event').timeStamp) {
// if the low-res timestamp which is bigger than the event timestamp
// (which is evaluated AFTER) it means the event is using a hi-res timestamp,
// and we need to use the hi-res version for event listeners as well.
   getNow = function () { return performance.now(); };
}

/**
   * Flush both queues and run the watchers.
   */
function flushSchedulerQueue () {
    currentFlushTimestamp = getNow();
    flushing = true;
    var watcher, id;

// Sort queue before flush.
// This ensures that:
// 1. Components are updated from parent to child. (because parent is always
//    created before the child)
// 2. A component's user watchers are run before its render watcher (because
//    user watchers are created before the render watcher)
// 3. If a component is destroyed during a parent component's watcher run,
//    its watchers can be skipped.
      queue.sort(function (a, b) { return a.id - b.id; });

// do not cache length because more watchers might be pushed
// as we run existing watchers
   for (index = 0; index < queue.length; index++) {
    watcher = queue[index];
if (watcher.before) {
    watcher.before();
}
id = watcher.id;
has[id] = null;
watcher.run();
// in dev build, check and stop circular updates.
if (has[id] != null) {
    circular[id] = (circular[id] || 0) + 1;
if (circular[id] > MAX_UPDATE_COUNT) {
warn(
'You may have an infinite update loop ' + (
watcher.user
? ("in watcher with expression \"" + (watcher.expression) + "\"")
: "in a component render function."
),
watcher.vm
);
    break
}
}
}

// keep copies of post queues before resetting state
   var activatedQueue = activatedChildren.slice();
var updatedQueue = queue.slice();

resetSchedulerState();

// call component updated and activated hooks
callActivatedHooks(activatedQueue);
callUpdatedHooks(updatedQueue);

// devtool hook
       /* istanbul ignore if */
   if (devtools && config.devtools) {
    devtools.emit('flush');
}
}

function callUpdatedHooks (queue) {
    var i = queue.length;
while (i--) {
    var watcher = queue[i];
    var vm = watcher.vm;
if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
callHook(vm, 'updated');
}
}
}

/**
   * Queue a kept-alive component that was activated during patch.
   * The queue will be processed after the entire tree has been patched.
   */
function queueActivatedComponent (vm) {
// setting _inactive to false here so that a render function can
// rely on checking whether it's in an inactive tree (e.g. router-view)
vm._inactive = false;
    activatedChildren.push(vm);
}

function callActivatedHooks (queue) {
    for (var i = 0; i < queue.length; i++) {
    queue[i]._inactive = true;
activateChildComponent(queue[i], true /* true */);
}
}

/**
   * Push a watcher into the watcher queue.
   * Jobs with duplicate IDs will be skipped unless it's
   * pushed when the queue is being flushed.
   */
function queueWatcher (watcher) {
    var id = watcher.id;
if (has[id] == null) {
    has[id] = true;
if (!flushing) {
    queue.push(watcher);
} else {
  // if already flushing, splice the watcher based on its id
  // if already past its id, it will be run next immediately.
  var i = queue.length - 1;
while (i > index && queue[i].id > watcher.id) {
    i--;
}
queue.splice(i + 1, 0, watcher);
}
// queue the flush
   if (!waiting) {
    waiting = true;

if (!config.async) {
flushSchedulerQueue();
    return
}
nextTick(flushSchedulerQueue);
}
}
}

/*  */



var uid$2 = 0;

/**
   * A watcher parses an expression, collects dependencies,
   * and fires callback when the expression value changes.
   * This is used for both the $watch() api and directives.
   */
var Watcher = function Watcher (
vm,
expOrFn,
cb,
options,
isRenderWatcher
) {
    this.vm = vm;
if (isRenderWatcher) {
    vm._watcher = this;
}
vm._watchers.push(this);
// options
   if (options) {
    this.deep = !!options.deep;
    this.user = !!options.user;
    this.lazy = !!options.lazy;
    this.sync = !!options.sync;
    this.before = options.before;
} else {
      this.deep = this.user = this.lazy = this.sync = false;
  }
this.cb = cb;
this.id = ++uid$2; // uid for batching
                      this.active = true;
this.dirty = this.lazy; // for lazy watchers
                           this.deps = [];
this.newDeps = [];
this.depIds = new _Set();
this.newDepIds = new _Set();
this.expression = expOrFn.toString();
// parse expression for getter
   if (typeof expOrFn === 'function') {
    this.getter = expOrFn;
} else {
      this.getter = parsePath(expOrFn);
if (!this.getter) {
    this.getter = noop;
warn(
"Failed watching path: \"" + expOrFn + "\" " +
'Watcher only accepts simple dot-delimited paths. ' +
'For full control, use a function instead.',
vm
);
}
}
this.value = this.lazy
? undefined
  : this.get();
};

/**
   * Evaluate the getter, and re-collect dependencies.
   */
Watcher.prototype.get = function get () {
pushTarget(this);
    var value;
    var vm = this.vm;
try {
    value = this.getter.call(vm, vm);
} catch (e) {
if (this.user) {
handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
} else {
      throw e
  }
} finally {
// "touch" every property so they are all tracked as
// dependencies for deep watching
   if (this.deep) {
traverse(value);
}
popTarget();
this.cleanupDeps();
}
return value
};

/**
   * Add a dependency to this directive.
   */
Watcher.prototype.addDep = function addDep (dep) {
    var id = dep.id;
if (!this.newDepIds.has(id)) {
    this.newDepIds.add(id);
    this.newDeps.push(dep);
if (!this.depIds.has(id)) {
    dep.addSub(this);
}
}
};

/**
   * Clean up for dependency collection.
   */
Watcher.prototype.cleanupDeps = function cleanupDeps () {
    var i = this.deps.length;
while (i--) {
    var dep = this.deps[i];
if (!this.newDepIds.has(dep.id)) {
    dep.removeSub(this);
}
}
var tmp = this.depIds;
this.depIds = this.newDepIds;
this.newDepIds = tmp;
this.newDepIds.clear();
tmp = this.deps;
this.deps = this.newDeps;
this.newDeps = tmp;
this.newDeps.length = 0;
};

/**
   * Subscriber interface.
   * Will be called when a dependency changes.
   */
Watcher.prototype.update = function update () {
/* istanbul ignore else */
if (this.lazy) {
    this.dirty = true;
} else if (this.sync) {
    this.run();
} else {
  queueWatcher(this);
  }
};

/**
   * Scheduler job interface.
   * Will be called by the scheduler.
   */
Watcher.prototype.run = function run () {
if (this.active) {
    var value = this.get();
if (
value !== this.value ||
// Deep watchers and watchers on Object/Arrays should fire even
// when the value is the same, because the value may
// have mutated.
isObject(value) ||
        this.deep
) {
// set new value
var oldValue = this.value;
    this.value = value;
if (this.user) {
try {
    this.cb.call(this.vm, value, oldValue);
} catch (e) {
handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
}
} else {
      this.cb.call(this.vm, value, oldValue);
  }
}
}
};

/**
   * Evaluate the value of the watcher.
   * This only gets called for lazy watchers.
   */
Watcher.prototype.evaluate = function evaluate () {
    this.value = this.get();
    this.dirty = false;
};

/**
   * Depend on all deps collected by this watcher.
   */
Watcher.prototype.depend = function depend () {
    var i = this.deps.length;
while (i--) {
    this.deps[i].depend();
}
};

/**
   * Remove self from all dependencies' subscriber list.
   */
Watcher.prototype.teardown = function teardown () {
if (this.active) {
// remove self from vm's watcher list
// this is a somewhat expensive operation so we skip it
// if the vm is being destroyed.
   if (!this.vm._isBeingDestroyed) {
remove(this.vm._watchers, this);
}
var i = this.deps.length;
while (i--) {
    this.deps[i].removeSub(this);
}
this.active = false;
}
};

/*  */

var sharedPropertyDefinition = {
    enumerable: true,
    configurable: true,
    get: noop,
    set: noop
};

function proxy (target, sourceKey, key) {
sharedPropertyDefinition.get = function proxyGetter () {
    return this[sourceKey][key]
};
sharedPropertyDefinition.set = function proxySetter (val) {
    this[sourceKey][key] = val;
};
Object.defineProperty(target, key, sharedPropertyDefinition);
}

function initState (vm) {
    vm._watchers = [];
    var opts = vm.$options;
if (opts.props) { initProps(vm, opts.props); }
if (opts.methods) { initMethods(vm, opts.methods); }
if (opts.data) {
initData(vm);
} else {
observe(vm._data = {}, true /* asRootData */);
}
if (opts.computed) { initComputed(vm, opts.computed); }
if (opts.watch && opts.watch !== nativeWatch) {
initWatch(vm, opts.watch);
}
}

function initProps (vm, propsOptions) {
var propsData = vm.$options.propsData || {};
var props = vm._props = {};
// cache prop keys so that future props updates can iterate using Array
// instead of dynamic object key enumeration.
   var keys = vm.$options._propKeys = [];
var isRoot = !vm.$parent;
// root instance props should be converted
   if (!isRoot) {
toggleObserving(false);
}
var loop = function ( key ) {
    keys.push(key);
    var value = validateProp(key, propsOptions, propsData, vm);
/* istanbul ignore else */
{
    var hyphenatedKey = hyphenate(key);
if (isReservedAttribute(hyphenatedKey) ||
            config.isReservedAttr(hyphenatedKey)) {
warn(
("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
vm
);
}
defineReactive$$1(props, key, value, function () {
if (!isRoot && !isUpdatingChildComponent) {
warn(
"Avoid mutating a prop directly since the value will be " +
"overwritten whenever the parent component re-renders. " +
"Instead, use a data or computed property based on the prop's " +
"value. Prop being mutated: \"" + key + "\"",
vm
);
}
});
}
// static props are already proxied on the component's prototype
// during Vue.extend(). We only need to proxy props defined at
// instantiation here.
   if (!(key in vm)) {
proxy(vm, "_props", key);
}
};

for (var key in propsOptions) loop( key );
toggleObserving(true);
}

function initData (vm) {
    var data = vm.$options.data;
data = vm._data = typeof data === 'function'
? getData(data, vm)
: data || {};
if (!isPlainObject(data)) {
data = {};
warn(
'data functions should return an object:\n' +
'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
vm
);
}
// proxy data on instance
   var keys = Object.keys(data);
var props = vm.$options.props;
var methods = vm.$options.methods;
var i = keys.length;
while (i--) {
    var key = keys[i];
{
if (methods && hasOwn(methods, key)) {
warn(
("Method \"" + key + "\" has already been defined as a data property."),
vm
);
}
}
if (props && hasOwn(props, key)) {
warn(
"The data property \"" + key + "\" is already declared as a prop. " +
"Use prop default value instead.",
vm
);
} else if (!isReserved(key)) {
proxy(vm, "_data", key);
}
}
// observe data
observe(data, true /* asRootData */);
}

function getData (data, vm) {
// #7573 disable dep collection when invoking data getters
pushTarget();
try {
    return data.call(vm, vm)
} catch (e) {
handleError(e, vm, "data()");
return {}
} finally {
  popTarget();
  }
}

var computedWatcherOptions = { lazy: true };

function initComputed (vm, computed) {
// $flow-disable-line
var watchers = vm._computedWatchers = Object.create(null);
// computed properties are just getters during SSR
var isSSR = isServerRendering();

for (var key in computed) {
    var userDef = computed[key];
    var getter = typeof userDef === 'function' ? userDef : userDef.get;
if (getter == null) {
warn(
("Getter is missing for computed property \"" + key + "\"."),
vm
);
}

if (!isSSR) {
// create internal watcher for the computed property.
watchers[key] = new Watcher(
vm,
getter || noop,
noop,
computedWatcherOptions
);
}

// component-defined computed properties are already defined on the
// component prototype. We only need to define computed properties defined
// at instantiation here.
   if (!(key in vm)) {
defineComputed(vm, key, userDef);
} else {
if (key in vm.$data) {
warn(("The computed property \"" + key + "\" is already defined in data."), vm);
} else if (vm.$options.props && key in vm.$options.props) {
warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
}
}
}
}

function defineComputed (
target,
key,
userDef
) {
    var shouldCache = !isServerRendering();
if (typeof userDef === 'function') {
    sharedPropertyDefinition.get = shouldCache
    ? createComputedGetter(key)
: createGetterInvoker(userDef);
    sharedPropertyDefinition.set = noop;
} else {
      sharedPropertyDefinition.get = userDef.get
      ? shouldCache && userDef.cache !== false
      ? createComputedGetter(key)
  : createGetterInvoker(userDef.get)
  : noop;
      sharedPropertyDefinition.set = userDef.set || noop;
  }
if (sharedPropertyDefinition.set === noop) {
sharedPropertyDefinition.set = function () {
warn(
("Computed property \"" + key + "\" was assigned to but it has no setter."),
this
);
};
}
Object.defineProperty(target, key, sharedPropertyDefinition);
}

function createComputedGetter (key) {
return function computedGetter () {
    var watcher = this._computedWatchers && this._computedWatchers[key];
if (watcher) {
if (watcher.dirty) {
    watcher.evaluate();
}
if (Dep.target) {
    watcher.depend();
}
return watcher.value
}
}
}

function createGetterInvoker(fn) {
return function computedGetter () {
    return fn.call(this, this)
}
}

function initMethods (vm, methods) {
    var props = vm.$options.props;
for (var key in methods) {
{
if (typeof methods[key] !== 'function') {
warn(
"Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
"Did you reference the function correctly?",
vm
);
}
if (props && hasOwn(props, key)) {
warn(
("Method \"" + key + "\" has already been defined as a prop."),
vm
);
}
if ((key in vm) && isReserved(key)) {
warn(
"Method \"" + key + "\" conflicts with an existing Vue instance method. " +
"Avoid defining component methods that start with _ or $."
);
}
}
vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
}
}

function initWatch (vm, watch) {
for (var key in watch) {
    var handler = watch[key];
if (Array.isArray(handler)) {
    for (var i = 0; i < handler.length; i++) {
createWatcher(vm, key, handler[i]);
}
} else {
  createWatcher(vm, key, handler);
  }
}
}

function createWatcher (
vm,
expOrFn,
handler,
options
) {
if (isPlainObject(handler)) {
    options = handler;
    handler = handler.handler;
}
if (typeof handler === 'string') {
    handler = vm[handler];
}
return vm.$watch(expOrFn, handler, options)
}

function stateMixin (Vue) {
// flow somehow has problems with directly declared definition object
// when using Object.defineProperty, so we have to procedurally build up
// the object here.
   var dataDef = {};
dataDef.get = function () { return this._data };
var propsDef = {};
propsDef.get = function () { return this._props };
{
dataDef.set = function () {
warn(
'Avoid replacing instance root $data. ' +
'Use nested data properties instead.',
this
);
};
propsDef.set = function () {
warn("$props is readonly.", this);
};
}
Object.defineProperty(Vue.prototype, '$data', dataDef);
Object.defineProperty(Vue.prototype, '$props', propsDef);

Vue.prototype.$set = set;
Vue.prototype.$delete = del;

Vue.prototype.$watch = function (
expOrFn,
cb,
options
) {
    var vm = this;
if (isPlainObject(cb)) {
    return createWatcher(vm, expOrFn, cb, options)
}
options = options || {};
options.user = true;
var watcher = new Watcher(vm, expOrFn, cb, options);
if (options.immediate) {
try {
    cb.call(vm, watcher.value);
} catch (error) {
handleError(error, vm, ("callback for immediate watcher \"" + (watcher.expression) + "\""));
}
}
return function unwatchFn () {
    watcher.teardown();
}
};
}

/*  */

var uid$3 = 0;

function initMixin (Vue) {
Vue.prototype._init = function (options) {
    var vm = this;
// a uid
vm._uid = uid$3++;

    var startTag, endTag;
/* istanbul ignore if */
if (config.performance && mark) {
    startTag = "vue-perf-start:" + (vm._uid);
    endTag = "vue-perf-end:" + (vm._uid);
mark(startTag);
}

// a flag to avoid this being observed
   vm._isVue = true;
// merge options
   if (options && options._isComponent) {
// optimize internal component instantiation
// since dynamic options merging is pretty slow, and none of the
// internal component options needs special treatment.
initInternalComponent(vm, options);
} else {
vm.$options = mergeOptions(
resolveConstructorOptions(vm.constructor),
options || {},
vm
);
}
/* istanbul ignore else */
{
initProxy(vm);
}
// expose real self
   vm._self = vm;
initLifecycle(vm);
initEvents(vm);
initRender(vm);
callHook(vm, 'beforeCreate');
initInjections(vm); // resolve injections before data/props
initState(vm);
initProvide(vm); // resolve provide after data/props
callHook(vm, 'created');

/* istanbul ignore if */
if (config.performance && mark) {
    vm._name = formatComponentName(vm, false);
mark(endTag);
measure(("vue " + (vm._name) + " init"), startTag, endTag);
}

if (vm.$options.el) {
    vm.$mount(vm.$options.el);
}
};
}

function initInternalComponent (vm, options) {
    var opts = vm.$options = Object.create(vm.constructor.options);
// doing this because it's faster than dynamic enumeration.
var parentVnode = options._parentVnode;
    opts.parent = options.parent;
    opts._parentVnode = parentVnode;

    var vnodeComponentOptions = parentVnode.componentOptions;
    opts.propsData = vnodeComponentOptions.propsData;
    opts._parentListeners = vnodeComponentOptions.listeners;
    opts._renderChildren = vnodeComponentOptions.children;
    opts._componentTag = vnodeComponentOptions.tag;

if (options.render) {
    opts.render = options.render;
    opts.staticRenderFns = options.staticRenderFns;
}
}

function resolveConstructorOptions (Ctor) {
    var options = Ctor.options;
if (Ctor.super) {
    var superOptions = resolveConstructorOptions(Ctor.super);
    var cachedSuperOptions = Ctor.superOptions;
if (superOptions !== cachedSuperOptions) {
// super option changed,
// need to resolve new options.
Ctor.superOptions = superOptions;
// check if there are any late-modified/attached options (#4976)
var modifiedOptions = resolveModifiedOptions(Ctor);
// update base extend options
   if (modifiedOptions) {
extend(Ctor.extendOptions, modifiedOptions);
}
options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
if (options.name) {
    options.components[options.name] = Ctor;
}
}
}
return options
}

function resolveModifiedOptions (Ctor) {
    var modified;
    var latest = Ctor.options;
    var sealed = Ctor.sealedOptions;
for (var key in latest) {
if (latest[key] !== sealed[key]) {
if (!modified) { modified = {}; }
modified[key] = latest[key];
}
}
return modified
}

function Vue (options) {
if (!(this instanceof Vue)
) {
warn('Vue is a constructor and should be called with the `new` keyword');
}
this._init(options);
}

initMixin(Vue);
stateMixin(Vue);
eventsMixin(Vue);
lifecycleMixin(Vue);
renderMixin(Vue);

/*  */

function initUse (Vue) {
Vue.use = function (plugin) {
    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
if (installedPlugins.indexOf(plugin) > -1) {
    return this
}

// additional parameters
   var args = toArray(arguments, 1);
args.unshift(this);
if (typeof plugin.install === 'function') {
    plugin.install.apply(plugin, args);
} else if (typeof plugin === 'function') {
    plugin.apply(null, args);
}
installedPlugins.push(plugin);
return this
};
}

/*  */

function initMixin$1 (Vue) {
Vue.mixin = function (mixin) {
    this.options = mergeOptions(this.options, mixin);
    return this
};
}

/*  */

function initExtend (Vue) {
/**
     * Each instance constructor, including Vue, has a unique
     * cid. This enables us to create wrapped "child
     * constructors" for prototypal inheritance and cache them.
     */
    Vue.cid = 0;
    var cid = 1;

/**
     * Class inheritance
     */
Vue.extend = function (extendOptions) {
extendOptions = extendOptions || {};
var Super = this;
var SuperId = Super.cid;
var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
if (cachedCtors[SuperId]) {
    return cachedCtors[SuperId]
}

var name = extendOptions.name || Super.options.name;
if (name) {
validateComponentName(name);
}

var Sub = function VueComponent (options) {
    this._init(options);
};
Sub.prototype = Object.create(Super.prototype);
Sub.prototype.constructor = Sub;
Sub.cid = cid++;
Sub.options = mergeOptions(
Super.options,
extendOptions
);
Sub['super'] = Super;

// For props and computed properties, we define the proxy getters on
// the Vue instances at extension time, on the extended prototype. This
// avoids Object.defineProperty calls for each instance created.
   if (Sub.options.props) {
    initProps$1(Sub);
}
if (Sub.options.computed) {
    initComputed$1(Sub);
}

// allow further extension/mixin/plugin usage
   Sub.extend = Super.extend;
Sub.mixin = Super.mixin;
Sub.use = Super.use;

// create asset registers, so extended classes
// can have their private assets too.
   ASSET_TYPES.forEach(function (type) {
    Sub[type] = Super[type];
});
// enable recursive self-lookup
   if (name) {
    Sub.options.components[name] = Sub;
}

// keep a reference to the super options at extension time.
// later at instantiation we can check if Super's options have
// been updated.
   Sub.superOptions = Super.options;
Sub.extendOptions = extendOptions;
Sub.sealedOptions = extend({}, Sub.options);

// cache constructor
   cachedCtors[SuperId] = Sub;
return Sub
};
}

function initProps$1 (Comp) {
    var props = Comp.options.props;
for (var key in props) {
proxy(Comp.prototype, "_props", key);
}
}

function initComputed$1 (Comp) {
    var computed = Comp.options.computed;
for (var key in computed) {
defineComputed(Comp.prototype, key, computed[key]);
}
}

/*  */

function initAssetRegisters (Vue) {
/**
     * Create asset registration methods.
     */
ASSET_TYPES.forEach(function (type) {
Vue[type] = function (
id,
definition
) {
if (!definition) {
    return this.options[type + 's'][id]
} else {
/* istanbul ignore if */
if (type === 'component') {
validateComponentName(id);
}
if (type === 'component' && isPlainObject(definition)) {
    definition.name = definition.name || id;
    definition = this.options._base.extend(definition);
}
if (type === 'directive' && typeof definition === 'function') {
definition = { bind: definition, update: definition };
}
this.options[type + 's'][id] = definition;
return definition
}
};
});
}

/*  */



function getComponentName (opts) {
    return opts && (opts.Ctor.options.name || opts.tag)
}

function matches (pattern, name) {
if (Array.isArray(pattern)) {
    return pattern.indexOf(name) > -1
} else if (typeof pattern === 'string') {
    return pattern.split(',').indexOf(name) > -1
} else if (isRegExp(pattern)) {
    return pattern.test(name)
}
/* istanbul ignore next */
return false
}

function pruneCache (keepAliveInstance, filter) {
    var cache = keepAliveInstance.cache;
    var keys = keepAliveInstance.keys;
    var _vnode = keepAliveInstance._vnode;
for (var key in cache) {
    var cachedNode = cache[key];
if (cachedNode) {
    var name = getComponentName(cachedNode.componentOptions);
if (name && !filter(name)) {
pruneCacheEntry(cache, key, keys, _vnode);
}
}
}
}

function pruneCacheEntry (
cache,
key,
keys,
current
) {
    var cached$$1 = cache[key];
if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
    cached$$1.componentInstance.$destroy();
}
cache[key] = null;
remove(keys, key);
}

var patternTypes = [String, RegExp, Array];

var KeepAlive = {
name: 'keep-alive',
abstract: true,

props: {
    include: patternTypes,
    exclude: patternTypes,
    max: [String, Number]
},

created: function created () {
    this.cache = Object.create(null);
    this.keys = [];
},

destroyed: function destroyed () {
for (var key in this.cache) {
pruneCacheEntry(this.cache, key, this.keys);
}
},

mounted: function mounted () {
    var this$1 = this;

this.$watch('include', function (val) {
pruneCache(this$1, function (name) { return matches(val, name); });
});
this.$watch('exclude', function (val) {
pruneCache(this$1, function (name) { return !matches(val, name); });
});
},

render: function render () {
    var slot = this.$slots.default;
    var vnode = getFirstComponentChild(slot);
    var componentOptions = vnode && vnode.componentOptions;
if (componentOptions) {
// check pattern
var name = getComponentName(componentOptions);
    var ref = this;
    var include = ref.include;
    var exclude = ref.exclude;
if (
// not included
(include && (!name || !matches(include, name))) ||
// excluded
(exclude && name && matches(exclude, name))
) {
    return vnode
}

var ref$1 = this;
var cache = ref$1.cache;
var keys = ref$1.keys;
var key = vnode.key == null
// same constructor may get registered as different local components
// so cid alone is not enough (#3269)
? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
: vnode.key;
if (cache[key]) {
    vnode.componentInstance = cache[key].componentInstance;
// make current key freshest
remove(keys, key);
    keys.push(key);
} else {
      cache[key] = vnode;
      keys.push(key);
// prune oldest entry
   if (this.max && keys.length > parseInt(this.max)) {
pruneCacheEntry(cache, keys[0], keys, this._vnode);
}
}

vnode.data.keepAlive = true;
}
return vnode || (slot && slot[0])
}
};

var builtInComponents = {
    KeepAlive: KeepAlive
};

/*  */

function initGlobalAPI (Vue) {
// config
   var configDef = {};
configDef.get = function () { return config; };
{
configDef.set = function () {
warn(
'Do not replace the Vue.config object, set individual fields instead.'
);
};
}
Object.defineProperty(Vue, 'config', configDef);

// exposed util methods.
// NOTE: these are not considered part of the public API - avoid relying on
// them unless you are aware of the risk.
   Vue.util = {
    warn: warn,
    extend: extend,
    mergeOptions: mergeOptions,
    defineReactive: defineReactive$$1
};

Vue.set = set;
Vue.delete = del;
Vue.nextTick = nextTick;

// 2.6 explicit observable API
       Vue.observable = function (obj) {
observe(obj);
    return obj
};

Vue.options = Object.create(null);
ASSET_TYPES.forEach(function (type) {
    Vue.options[type + 's'] = Object.create(null);
});

// this is used to identify the "base" constructor to extend all plain-object
// components with in Weex's multi-instance scenarios.
Vue.options._base = Vue;

extend(Vue.options.components, builtInComponents);

initUse(Vue);
initMixin$1(Vue);
initExtend(Vue);
initAssetRegisters(Vue);
}

initGlobalAPI(Vue);

Object.defineProperty(Vue.prototype, '$isServer', {
    get: isServerRendering
});

Object.defineProperty(Vue.prototype, '$ssrContext', {
get: function get () {
/* istanbul ignore next */
    return this.$vnode && this.$vnode.ssrContext
}
});

// expose FunctionalRenderContext for ssr runtime helper installation
   Object.defineProperty(Vue, 'FunctionalRenderContext', {
    value: FunctionalRenderContext
});

Vue.version = '2.6.8';

/*  */

// these are reserved for web because they are directly compiled away
// during template compilation
   var isReservedAttr = makeMap('style,class');

// attributes that should be using props for binding
   var acceptValue = makeMap('input,textarea,option,select,progress');
var mustUseProp = function (tag, type, attr) {
    return (
    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
(attr === 'selected' && tag === 'option') ||
(attr === 'checked' && tag === 'input') ||
(attr === 'muted' && tag === 'video')
)
};

var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');

var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');

var convertEnumeratedValue = function (key, value) {
    return isFalsyAttrValue(value) || value === 'false'
    ? 'false'
    // allow arbitrary string value for contenteditable
: key === 'contenteditable' && isValidContentEditableValue(value)
? value
: 'true'
};

var isBooleanAttr = makeMap(
'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
'required,reversed,scoped,seamless,selected,sortable,translate,' +
'truespeed,typemustmatch,visible'
);

var xlinkNS = 'http://www.w3.org/1999/xlink';

var isXlink = function (name) {
    return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
};

var getXlinkProp = function (name) {
    return isXlink(name) ? name.slice(6, name.length) : ''
};

var isFalsyAttrValue = function (val) {
    return val == null || val === false
};

/*  */

function genClassForVnode (vnode) {
    var data = vnode.data;
    var parentNode = vnode;
    var childNode = vnode;
while (isDef(childNode.componentInstance)) {
    childNode = childNode.componentInstance._vnode;
if (childNode && childNode.data) {
    data = mergeClassData(childNode.data, data);
}
}
while (isDef(parentNode = parentNode.parent)) {
if (parentNode && parentNode.data) {
    data = mergeClassData(data, parentNode.data);
}
}
return renderClass(data.staticClass, data.class)
}

function mergeClassData (child, parent) {
return {
    staticClass: concat(child.staticClass, parent.staticClass),
    class: isDef(child.class)
    ? [child.class, parent.class]
    : parent.class
}
}

function renderClass (
staticClass,
dynamicClass
) {
if (isDef(staticClass) || isDef(dynamicClass)) {
    return concat(staticClass, stringifyClass(dynamicClass))
}
/* istanbul ignore next */
return ''
}

function concat (a, b) {
    return a ? b ? (a + ' ' + b) : a : (b || '')
}

function stringifyClass (value) {
if (Array.isArray(value)) {
    return stringifyArray(value)
}
if (isObject(value)) {
    return stringifyObject(value)
}
if (typeof value === 'string') {
    return value
}
/* istanbul ignore next */
return ''
}

function stringifyArray (value) {
    var res = '';
    var stringified;
    for (var i = 0, l = value.length; i < l; i++) {
if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
if (res) { res += ' '; }
res += stringified;
}
}
return res
}

function stringifyObject (value) {
    var res = '';
for (var key in value) {
if (value[key]) {
if (res) { res += ' '; }
res += key;
}
}
return res
}

/*  */

var namespaceMap = {
    svg: 'http://www.w3.org/2000/svg',
    math: 'http://www.w3.org/1998/Math/MathML'
};

var isHTMLTag = makeMap(
'html,body,base,head,link,meta,style,title,' +
'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
'embed,object,param,source,canvas,script,noscript,del,ins,' +
'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
'output,progress,select,textarea,' +
'details,dialog,menu,menuitem,summary,' +
'content,element,shadow,template,blockquote,iframe,tfoot'
);

// this map is intentionally selective, only covering SVG elements that may
// contain child elements.
   var isSVG = makeMap(
'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
true
);

var isPreTag = function (tag) { return tag === 'pre'; };

var isReservedTag = function (tag) {
    return isHTMLTag(tag) || isSVG(tag)
};

function getTagNamespace (tag) {
if (isSVG(tag)) {
    return 'svg'
}
// basic support for MathML
// note it doesn't support other MathML elements being component roots
if (tag === 'math') {
    return 'math'
}
}

var unknownElementCache = Object.create(null);
function isUnknownElement (tag) {
/* istanbul ignore if */
if (!inBrowser) {
    return true
}
if (isReservedTag(tag)) {
    return false
}
tag = tag.toLowerCase();
/* istanbul ignore if */
if (unknownElementCache[tag] != null) {
    return unknownElementCache[tag]
}
var el = document.createElement(tag);
if (tag.indexOf('-') > -1) {
// http://stackoverflow.com/a/28210364/1070244
return (unknownElementCache[tag] = (
el.constructor === window.HTMLUnknownElement ||
el.constructor === window.HTMLElement
))
} else {
      return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
  }
}

var isTextInputType = makeMap('text,number,password,search,email,tel,url');

/*  */

/**
   * Query an element selector if it's not an element already.
   */
function query (el) {
if (typeof el === 'string') {
    var selected = document.querySelector(el);
if (!selected) {
warn(
'Cannot find element: ' + el
);
    return document.createElement('div')
}
return selected
} else {
      return el
  }
}

/*  */

function createElement$1 (tagName, vnode) {
    var elm = document.createElement(tagName);
if (tagName !== 'select') {
    return elm
}
// false or null will remove the attribute but undefined will not
   if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
    elm.setAttribute('multiple', 'multiple');
}
return elm
}

function createElementNS (namespace, tagName) {
    return document.createElementNS(namespaceMap[namespace], tagName)
}

function createTextNode (text) {
    return document.createTextNode(text)
}

function createComment (text) {
    return document.createComment(text)
}

function insertBefore (parentNode, newNode, referenceNode) {
    parentNode.insertBefore(newNode, referenceNode);
}

function removeChild (node, child) {
    node.removeChild(child);
}

function appendChild (node, child) {
    node.appendChild(child);
}

function parentNode (node) {
    return node.parentNode
}

function nextSibling (node) {
    return node.nextSibling
}

function tagName (node) {
    return node.tagName
}

function setTextContent (node, text) {
    node.textContent = text;
}

function setStyleScope (node, scopeId) {
    node.setAttribute(scopeId, '');
}

var nodeOps = /*#__PURE__*/Object.freeze({
    createElement: createElement$1,
    createElementNS: createElementNS,
    createTextNode: createTextNode,
    createComment: createComment,
    insertBefore: insertBefore,
    removeChild: removeChild,
    appendChild: appendChild,
    parentNode: parentNode,
    nextSibling: nextSibling,
    tagName: tagName,
    setTextContent: setTextContent,
    setStyleScope: setStyleScope
});

/*  */

var ref = {
create: function create (_, vnode) {
registerRef(vnode);
},
update: function update (oldVnode, vnode) {
if (oldVnode.data.ref !== vnode.data.ref) {
registerRef(oldVnode, true);
registerRef(vnode);
}
},
destroy: function destroy (vnode) {
registerRef(vnode, true);
}
};

function registerRef (vnode, isRemoval) {
    var key = vnode.data.ref;
if (!isDef(key)) { return }

var vm = vnode.context;
var ref = vnode.componentInstance || vnode.elm;
var refs = vm.$refs;
if (isRemoval) {
if (Array.isArray(refs[key])) {
remove(refs[key], ref);
} else if (refs[key] === ref) {
    refs[key] = undefined;
}
} else {
if (vnode.data.refInFor) {
if (!Array.isArray(refs[key])) {
    refs[key] = [ref];
} else if (refs[key].indexOf(ref) < 0) {
// $flow-disable-line
refs[key].push(ref);
}
} else {
      refs[key] = ref;
  }
}
}

/**
   * Virtual DOM patching algorithm based on Snabbdom by
   * Simon Friis Vindum (@paldepind)
   * Licensed under the MIT License
   * https://github.com/paldepind/snabbdom/blob/master/LICENSE
   *
   * modified by Evan You (@yyx990803)
   *
   * Not type-checking this because this file is perf-critical and the cost
   * of making flow understand it is not worth it.
   */

var emptyNode = new VNode('', {}, []);

var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];

function sameVnode (a, b) {
    return (
    a.key === b.key && (
    (
    a.tag === b.tag &&
    a.isComment === b.isComment &&
    isDef(a.data) === isDef(b.data) &&
    sameInputType(a, b)
) || (
isTrue(a.isAsyncPlaceholder) &&
a.asyncFactory === b.asyncFactory &&
isUndef(b.asyncFactory.error)
)
)
)
}

function sameInputType (a, b) {
if (a.tag !== 'input') { return true }
var i;
var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
}

function createKeyToOldIdx (children, beginIdx, endIdx) {
    var i, key;
var map = {};
for (i = beginIdx; i <= endIdx; ++i) {
    key = children[i].key;
if (isDef(key)) { map[key] = i; }
}
return map
}

function createPatchFunction (backend) {
    var i, j;
var cbs = {};

var modules = backend.modules;
var nodeOps = backend.nodeOps;

for (i = 0; i < hooks.length; ++i) {
    cbs[hooks[i]] = [];
    for (j = 0; j < modules.length; ++j) {
if (isDef(modules[j][hooks[i]])) {
    cbs[hooks[i]].push(modules[j][hooks[i]]);
}
}
}

function emptyNodeAt (elm) {
return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
}

function createRmCb (childElm, listeners) {
function remove$$1 () {
if (--remove$$1.listeners === 0) {
removeNode(childElm);
}
}
remove$$1.listeners = listeners;
return remove$$1
}

function removeNode (el) {
    var parent = nodeOps.parentNode(el);
// element may have already been removed due to v-html / v-text
                                                         if (isDef(parent)) {
    nodeOps.removeChild(parent, el);
}
}

function isUnknownElement$$1 (vnode, inVPre) {
return (
!inVPre &&
!vnode.ns &&
!(
config.ignoredElements.length &&
config.ignoredElements.some(function (ignore) {
    return isRegExp(ignore)
    ? ignore.test(vnode.tag)
: ignore === vnode.tag
})
) &&
config.isUnknownElement(vnode.tag)
)
}

var creatingElmInVPre = 0;

function createElm (
vnode,
insertedVnodeQueue,
parentElm,
refElm,
nested,
ownerArray,
index
) {
if (isDef(vnode.elm) && isDef(ownerArray)) {
// This vnode was used in a previous render!
// now it's used as a new node, overwriting its elm would cause
// potential patch errors down the road when it's used as an insertion
// reference node. Instead, we clone the node on-demand before creating
// associated DOM element for it.
vnode = ownerArray[index] = cloneVNode(vnode);
}

vnode.isRootInsert = !nested; // for transition enter check
                                 if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
    return
}

var data = vnode.data;
var children = vnode.children;
var tag = vnode.tag;
if (isDef(tag)) {
{
if (data && data.pre) {
    creatingElmInVPre++;
}
if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
warn(
'Unknown custom element: <' + tag + '> - did you ' +
'register the component correctly? For recursive components, ' +
'make sure to provide the "name" option.',
vnode.context
);
}
}

vnode.elm = vnode.ns
? nodeOps.createElementNS(vnode.ns, tag)
: nodeOps.createElement(tag, vnode);
setScope(vnode);

/* istanbul ignore if */
{
createChildren(vnode, children, insertedVnodeQueue);
if (isDef(data)) {
invokeCreateHooks(vnode, insertedVnodeQueue);
}
insert(parentElm, vnode.elm, refElm);
}

if (data && data.pre) {
    creatingElmInVPre--;
}
} else if (isTrue(vnode.isComment)) {
    vnode.elm = nodeOps.createComment(vnode.text);
insert(parentElm, vnode.elm, refElm);
} else {
      vnode.elm = nodeOps.createTextNode(vnode.text);
  insert(parentElm, vnode.elm, refElm);
  }
}

function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
    var i = vnode.data;
if (isDef(i)) {
    var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
if (isDef(i = i.hook) && isDef(i = i.init)) {
i(vnode, false /* hydrating */);
}
// after calling the init hook, if the vnode is a child component
// it should've created a child instance and mounted it. the child
// component also has set the placeholder vnode's elm.
// in that case we can just return the element and be done.
   if (isDef(vnode.componentInstance)) {
initComponent(vnode, insertedVnodeQueue);
insert(parentElm, vnode.elm, refElm);
if (isTrue(isReactivated)) {
reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
}
return true
}
}
}

function initComponent (vnode, insertedVnodeQueue) {
if (isDef(vnode.data.pendingInsert)) {
    insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
    vnode.data.pendingInsert = null;
}
vnode.elm = vnode.componentInstance.$el;
if (isPatchable(vnode)) {
invokeCreateHooks(vnode, insertedVnodeQueue);
setScope(vnode);
} else {
  // empty component root.
  // skip all element-related modules except for ref (#3455)
  registerRef(vnode);
  // make sure to invoke the insert hook
  insertedVnodeQueue.push(vnode);
  }
}

function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
    var i;
// hack for #4339: a reactivated component with inner transition
// does not trigger because the inner node's created hooks are not called
// again. It's not ideal to involve module-specific logic in here but
// there doesn't seem to be a better way to do it.
var innerNode = vnode;
while (innerNode.componentInstance) {
    innerNode = innerNode.componentInstance._vnode;
if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
    for (i = 0; i < cbs.activate.length; ++i) {
    cbs.activate[i](emptyNode, innerNode);
}
insertedVnodeQueue.push(innerNode);
break
}
}
// unlike a newly created component,
// a reactivated keep-alive component doesn't insert itself
insert(parentElm, vnode.elm, refElm);
}

function insert (parent, elm, ref$$1) {
if (isDef(parent)) {
if (isDef(ref$$1)) {
if (nodeOps.parentNode(ref$$1) === parent) {
    nodeOps.insertBefore(parent, elm, ref$$1);
}
} else {
      nodeOps.appendChild(parent, elm);
  }
}
}

function createChildren (vnode, children, insertedVnodeQueue) {
if (Array.isArray(children)) {
{
checkDuplicateKeys(children);
}
for (var i = 0; i < children.length; ++i) {
createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
}
} else if (isPrimitive(vnode.text)) {
    nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
}
}

function isPatchable (vnode) {
while (vnode.componentInstance) {
    vnode = vnode.componentInstance._vnode;
}
return isDef(vnode.tag)
}

function invokeCreateHooks (vnode, insertedVnodeQueue) {
    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
    cbs.create[i$1](emptyNode, vnode);
}
i = vnode.data.hook; // Reuse variable
                        if (isDef(i)) {
if (isDef(i.create)) { i.create(emptyNode, vnode); }
if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
}
}

// set scope id attribute for scoped CSS.
// this is implemented as a special case to avoid the overhead
// of going through the normal attribute patching process.
   function setScope (vnode) {
    var i;
if (isDef(i = vnode.fnScopeId)) {
    nodeOps.setStyleScope(vnode.elm, i);
} else {
      var ancestor = vnode;
while (ancestor) {
if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
    nodeOps.setStyleScope(vnode.elm, i);
}
ancestor = ancestor.parent;
}
}
// for slot content they should also get the scopeId from the host instance.
   if (isDef(i = activeInstance) &&
i !== vnode.context &&
i !== vnode.fnContext &&
isDef(i = i.$options._scopeId)
) {
    nodeOps.setStyleScope(vnode.elm, i);
}
}

function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
    for (; startIdx <= endIdx; ++startIdx) {
createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
}
}

function invokeDestroyHook (vnode) {
    var i, j;
    var data = vnode.data;
if (isDef(data)) {
if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
}
if (isDef(i = vnode.children)) {
    for (j = 0; j < vnode.children.length; ++j) {
invokeDestroyHook(vnode.children[j]);
}
}
}

function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
    for (; startIdx <= endIdx; ++startIdx) {
    var ch = vnodes[startIdx];
if (isDef(ch)) {
if (isDef(ch.tag)) {
removeAndInvokeRemoveHook(ch);
invokeDestroyHook(ch);
} else { // Text node
  removeNode(ch.elm);
  }
}
}
}

function removeAndInvokeRemoveHook (vnode, rm) {
if (isDef(rm) || isDef(vnode.data)) {
    var i;
    var listeners = cbs.remove.length + 1;
if (isDef(rm)) {
// we have a recursively passed down rm callback
// increase the listeners count
rm.listeners += listeners;
} else {
  // directly removing
  rm = createRmCb(vnode.elm, listeners);
  }
// recursively invoke hooks on child component root node
   if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
removeAndInvokeRemoveHook(i, rm);
}
for (i = 0; i < cbs.remove.length; ++i) {
    cbs.remove[i](vnode, rm);
}
if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
i(vnode, rm);
} else {
  rm();
  }
} else {
  removeNode(vnode.elm);
  }
}

function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
    var oldStartIdx = 0;
    var newStartIdx = 0;
    var oldEndIdx = oldCh.length - 1;
    var oldStartVnode = oldCh[0];
    var oldEndVnode = oldCh[oldEndIdx];
    var newEndIdx = newCh.length - 1;
    var newStartVnode = newCh[0];
    var newEndVnode = newCh[newEndIdx];
    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;

// removeOnly is a special flag used only by <transition-group>
// to ensure removed elements stay in correct relative positions
// during leaving transitions
var canMove = !removeOnly;

{
checkDuplicateKeys(newCh);
}

while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
if (isUndef(oldStartVnode)) {
    oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
} else if (isUndef(oldEndVnode)) {
    oldEndVnode = oldCh[--oldEndIdx];
} else if (sameVnode(oldStartVnode, newStartVnode)) {
patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
    oldStartVnode = oldCh[++oldStartIdx];
    newStartVnode = newCh[++newStartIdx];
} else if (sameVnode(oldEndVnode, newEndVnode)) {
patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
    oldEndVnode = oldCh[--oldEndIdx];
    newEndVnode = newCh[--newEndIdx];
} else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
    canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
    oldStartVnode = oldCh[++oldStartIdx];
    newEndVnode = newCh[--newEndIdx];
} else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
    canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
    oldEndVnode = oldCh[--oldEndIdx];
    newStartVnode = newCh[++newStartIdx];
} else {
if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
idxInOld = isDef(newStartVnode.key)
? oldKeyToIdx[newStartVnode.key]
: findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
if (isUndef(idxInOld)) { // New element
createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
} else {
      vnodeToMove = oldCh[idxInOld];
if (sameVnode(vnodeToMove, newStartVnode)) {
patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
    oldCh[idxInOld] = undefined;
    canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
} else {
  // same key but different element. treat as new element
  createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
  }
}
newStartVnode = newCh[++newStartIdx];
}
}
if (oldStartIdx > oldEndIdx) {
    refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
} else if (newStartIdx > newEndIdx) {
removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
}
}

function checkDuplicateKeys (children) {
var seenKeys = {};
for (var i = 0; i < children.length; i++) {
    var vnode = children[i];
    var key = vnode.key;
if (isDef(key)) {
if (seenKeys[key]) {
warn(
("Duplicate keys detected: '" + key + "'. This may cause an update error."),
vnode.context
);
} else {
      seenKeys[key] = true;
  }
}
}
}

function findIdxInOld (node, oldCh, start, end) {
    for (var i = start; i < end; i++) {
    var c = oldCh[i];
if (isDef(c) && sameVnode(node, c)) { return i }
}
}

function patchVnode (
oldVnode,
vnode,
insertedVnodeQueue,
ownerArray,
index,
removeOnly
) {
if (oldVnode === vnode) {
    return
}

if (isDef(vnode.elm) && isDef(ownerArray)) {
// clone reused vnode
vnode = ownerArray[index] = cloneVNode(vnode);
}

var elm = vnode.elm = oldVnode.elm;

if (isTrue(oldVnode.isAsyncPlaceholder)) {
if (isDef(vnode.asyncFactory.resolved)) {
hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
} else {
      vnode.isAsyncPlaceholder = true;
  }
return
}

// reuse element for static trees.
// note we only do this if the vnode is cloned -
// if the new node is not cloned it means the render functions have been
// reset by the hot-reload-api and we need to do a proper re-render.
   if (isTrue(vnode.isStatic) &&
isTrue(oldVnode.isStatic) &&
vnode.key === oldVnode.key &&
(isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
) {
    vnode.componentInstance = oldVnode.componentInstance;
    return
}

var i;
var data = vnode.data;
if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
i(oldVnode, vnode);
}

var oldCh = oldVnode.children;
var ch = vnode.children;
if (isDef(data) && isPatchable(vnode)) {
    for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
}
if (isUndef(vnode.text)) {
if (isDef(oldCh) && isDef(ch)) {
if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
} else if (isDef(ch)) {
{
checkDuplicateKeys(ch);
}
if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
} else if (isDef(oldCh)) {
removeVnodes(elm, oldCh, 0, oldCh.length - 1);
} else if (isDef(oldVnode.text)) {
    nodeOps.setTextContent(elm, '');
}
} else if (oldVnode.text !== vnode.text) {
    nodeOps.setTextContent(elm, vnode.text);
}
if (isDef(data)) {
if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
}
}

function invokeInsertHook (vnode, queue, initial) {
// delay insert hooks for component root nodes, invoke them after the
// element is really inserted
   if (isTrue(initial) && isDef(vnode.parent)) {
    vnode.parent.data.pendingInsert = queue;
} else {
      for (var i = 0; i < queue.length; ++i) {
    queue[i].data.hook.insert(queue[i]);
}
}
}

var hydrationBailed = false;
// list of modules that can skip create hook during hydration because they
// are already rendered on the client or has no need for initialization
// Note: style is excluded because it relies on initial clone for future
// deep updates (#7063).
                       var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');

// Note: this is a browser-only function so we can assume elms are DOM nodes.
   function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
    var i;
    var tag = vnode.tag;
    var data = vnode.data;
    var children = vnode.children;
    inVPre = inVPre || (data && data.pre);
    vnode.elm = elm;

if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
    vnode.isAsyncPlaceholder = true;
    return true
}
// assert node match
   {
if (!assertNodeMatch(elm, vnode, inVPre)) {
    return false
}
}
if (isDef(data)) {
if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
if (isDef(i = vnode.componentInstance)) {
// child component. it should have hydrated its own tree.
initComponent(vnode, insertedVnodeQueue);
    return true
}
}
if (isDef(tag)) {
if (isDef(children)) {
// empty element, allow client to pick up and populate children
if (!elm.hasChildNodes()) {
createChildren(vnode, children, insertedVnodeQueue);
} else {
// v-html and domProps: innerHTML
   if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
if (i !== elm.innerHTML) {
/* istanbul ignore if */
if (typeof console !== 'undefined' &&
!hydrationBailed
) {
    hydrationBailed = true;
    console.warn('Parent: ', elm);
    console.warn('server innerHTML: ', i);
    console.warn('client innerHTML: ', elm.innerHTML);
}
return false
}
} else {
  // iterate and compare children lists
  var childrenMatch = true;
      var childNode = elm.firstChild;
      for (var i$1 = 0; i$1 < children.length; i$1++) {
if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
    childrenMatch = false;
    break
}
childNode = childNode.nextSibling;
}
// if childNode is not null, it means the actual childNodes list is
// longer than the virtual children list.
   if (!childrenMatch || childNode) {
/* istanbul ignore if */
if (typeof console !== 'undefined' &&
!hydrationBailed
) {
    hydrationBailed = true;
    console.warn('Parent: ', elm);
    console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
}
return false
}
}
}
}
if (isDef(data)) {
    var fullInvoke = false;
for (var key in data) {
if (!isRenderedModule(key)) {
    fullInvoke = true;
invokeCreateHooks(vnode, insertedVnodeQueue);
    break
}
}
if (!fullInvoke && data['class']) {
// ensure collecting deps for deep class bindings for future updates
traverse(data['class']);
}
}
} else if (elm.data !== vnode.text) {
    elm.data = vnode.text;
}
return true
}

function assertNodeMatch (node, vnode, inVPre) {
if (isDef(vnode.tag)) {
    return vnode.tag.indexOf('vue-component') === 0 || (
    !isUnknownElement$$1(vnode, inVPre) &&
vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
)
} else {
      return node.nodeType === (vnode.isComment ? 8 : 3)
  }
}

return function patch (oldVnode, vnode, hydrating, removeOnly) {
if (isUndef(vnode)) {
if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
return
}

var isInitialPatch = false;
var insertedVnodeQueue = [];

if (isUndef(oldVnode)) {
// empty mount (likely as component), create new root element
isInitialPatch = true;
createElm(vnode, insertedVnodeQueue);
} else {
      var isRealElement = isDef(oldVnode.nodeType);
if (!isRealElement && sameVnode(oldVnode, vnode)) {
// patch existing root node
patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
} else {
if (isRealElement) {
// mounting to a real element
// check if this is server-rendered content and if we can perform
// a successful hydration.
   if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
    oldVnode.removeAttribute(SSR_ATTR);
    hydrating = true;
}
if (isTrue(hydrating)) {
if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
invokeInsertHook(vnode, insertedVnodeQueue, true);
    return oldVnode
} else {
  warn(
  'The client-side rendered virtual DOM tree is not matching ' +
  'server-rendered content. This is likely caused by incorrect ' +
  'HTML markup, for example nesting block-level elements inside ' +
  '<p>, or missing <tbody>. Bailing hydration and performing ' +
  'full client-side render.'
  );
  }
}
// either not server-rendered, or hydration failed.
// create an empty node and replace it
   oldVnode = emptyNodeAt(oldVnode);
}

// replacing existing element
   var oldElm = oldVnode.elm;
var parentElm = nodeOps.parentNode(oldElm);

// create new node
createElm(
vnode,
insertedVnodeQueue,
// extremely rare edge case: do not insert if old element is in a
// leaving transition. Only happens when combining transition +
// keep-alive + HOCs. (#4590)
oldElm._leaveCb ? null : parentElm,
                  nodeOps.nextSibling(oldElm)
);

// update parent placeholder node element, recursively
if (isDef(vnode.parent)) {
    var ancestor = vnode.parent;
    var patchable = isPatchable(vnode);
while (ancestor) {
    for (var i = 0; i < cbs.destroy.length; ++i) {
    cbs.destroy[i](ancestor);
}
ancestor.elm = vnode.elm;
if (patchable) {
    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
    cbs.create[i$1](emptyNode, ancestor);
}
// #6513
// invoke insert hooks that may have been merged by create hooks.
// e.g. for directives that uses the "inserted" hook.
                                                var insert = ancestor.data.hook.insert;
if (insert.merged) {
// start at index 1 to avoid re-invoking component mounted hook
for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
    insert.fns[i$2]();
}
}
} else {
  registerRef(ancestor);
  }
ancestor = ancestor.parent;
}
}

// destroy old node
   if (isDef(parentElm)) {
removeVnodes(parentElm, [oldVnode], 0, 0);
} else if (isDef(oldVnode.tag)) {
invokeDestroyHook(oldVnode);
}
}
}

invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
return vnode.elm
}
}

/*  */

var directives = {
create: updateDirectives,
update: updateDirectives,
destroy: function unbindDirectives (vnode) {
updateDirectives(vnode, emptyNode);
}
};

function updateDirectives (oldVnode, vnode) {
if (oldVnode.data.directives || vnode.data.directives) {
_update(oldVnode, vnode);
}
}

function _update (oldVnode, vnode) {
    var isCreate = oldVnode === emptyNode;
    var isDestroy = vnode === emptyNode;
    var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
    var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);

    var dirsWithInsert = [];
    var dirsWithPostpatch = [];

    var key, oldDir, dir;
for (key in newDirs) {
    oldDir = oldDirs[key];
    dir = newDirs[key];
if (!oldDir) {
// new directive, bind
callHook$1(dir, 'bind', vnode, oldVnode);
if (dir.def && dir.def.inserted) {
    dirsWithInsert.push(dir);
}
} else {
  // existing directive, update
  dir.oldValue = oldDir.value;
      dir.oldArg = oldDir.arg;
      callHook$1(dir, 'update', vnode, oldVnode);
if (dir.def && dir.def.componentUpdated) {
    dirsWithPostpatch.push(dir);
}
}
}

if (dirsWithInsert.length) {
var callInsert = function () {
    for (var i = 0; i < dirsWithInsert.length; i++) {
    callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
}
};
if (isCreate) {
mergeVNodeHook(vnode, 'insert', callInsert);
} else {
  callInsert();
  }
}

if (dirsWithPostpatch.length) {
mergeVNodeHook(vnode, 'postpatch', function () {
    for (var i = 0; i < dirsWithPostpatch.length; i++) {
    callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
}
});
}

if (!isCreate) {
for (key in oldDirs) {
if (!newDirs[key]) {
// no longer present, unbind
callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
}
}
}
}

var emptyModifiers = Object.create(null);

function normalizeDirectives$1 (
dirs,
vm
) {
    var res = Object.create(null);
if (!dirs) {
// $flow-disable-line
return res
}
var i, dir;
for (i = 0; i < dirs.length; i++) {
    dir = dirs[i];
if (!dir.modifiers) {
// $flow-disable-line
dir.modifiers = emptyModifiers;
}
res[getRawDirName(dir)] = dir;
dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
}
// $flow-disable-line
    return res
}

function getRawDirName (dir) {
return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
}

function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
    var fn = dir.def && dir.def[hook];
if (fn) {
try {
fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
} catch (e) {
handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
}
}
}

var baseModules = [
    ref,
                  directives
];

/*  */

function updateAttrs (oldVnode, vnode) {
    var opts = vnode.componentOptions;
if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
    return
}
if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
    return
}
var key, cur, old;
var elm = vnode.elm;
var oldAttrs = oldVnode.data.attrs || {};
var attrs = vnode.data.attrs || {};
// clone observed objects, as the user probably wants to mutate it
if (isDef(attrs.__ob__)) {
attrs = vnode.data.attrs = extend({}, attrs);
}

for (key in attrs) {
    cur = attrs[key];
    old = oldAttrs[key];
if (old !== cur) {
setAttr(elm, key, cur);
}
}
// #4391: in IE9, setting type can reset value for input[type=radio]
// #6666: IE/Edge forces progress value down to 1 before setting a max
                                                      /* istanbul ignore if */
                                                  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
setAttr(elm, 'value', attrs.value);
}
for (key in oldAttrs) {
if (isUndef(attrs[key])) {
if (isXlink(key)) {
    elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
} else if (!isEnumeratedAttr(key)) {
    elm.removeAttribute(key);
}
}
}
}

function setAttr (el, key, value) {
if (el.tagName.indexOf('-') > -1) {
baseSetAttr(el, key, value);
} else if (isBooleanAttr(key)) {
// set attribute for blank value
// e.g. <option disabled>Select one</option>
                                     if (isFalsyAttrValue(value)) {
    el.removeAttribute(key);
} else {
  // technically allowfullscreen is a boolean attribute for <iframe>,
  // but Flash expects a value of "true" when used on <embed> tag
  value = key === 'allowfullscreen' && el.tagName === 'EMBED'
  ? 'true'
  : key;
      el.setAttribute(key, value);
  }
} else if (isEnumeratedAttr(key)) {
    el.setAttribute(key, convertEnumeratedValue(key, value));
} else if (isXlink(key)) {
if (isFalsyAttrValue(value)) {
    el.removeAttributeNS(xlinkNS, getXlinkProp(key));
} else {
      el.setAttributeNS(xlinkNS, key, value);
  }
} else {
  baseSetAttr(el, key, value);
  }
}

function baseSetAttr (el, key, value) {
if (isFalsyAttrValue(value)) {
    el.removeAttribute(key);
} else {
// #7138: IE10 & 11 fires input event when setting placeholder on
// <textarea>... block the first input event and remove the blocker
// immediately.
       /* istanbul ignore if */
   if (
isIE && !isIE9 &&
el.tagName === 'TEXTAREA' &&
key === 'placeholder' && value !== '' && !el.__ieph
) {
var blocker = function (e) {
    e.stopImmediatePropagation();
    el.removeEventListener('input', blocker);
};
el.addEventListener('input', blocker);
// $flow-disable-line
    el.__ieph = true; /* IE placeholder patched */
}
el.setAttribute(key, value);
}
}

var attrs = {
    create: updateAttrs,
    update: updateAttrs
};

/*  */

function updateClass (oldVnode, vnode) {
    var el = vnode.elm;
    var data = vnode.data;
    var oldData = oldVnode.data;
if (
isUndef(data.staticClass) &&
isUndef(data.class) && (
isUndef(oldData) || (
isUndef(oldData.staticClass) &&
isUndef(oldData.class)
)
)
) {
    return
}

var cls = genClassForVnode(vnode);

// handle transition classes
   var transitionClass = el._transitionClasses;
if (isDef(transitionClass)) {
    cls = concat(cls, stringifyClass(transitionClass));
}

// set the class
   if (cls !== el._prevClass) {
    el.setAttribute('class', cls);
    el._prevClass = cls;
}
}

var klass = {
    create: updateClass,
    update: updateClass
};

/*  */

var validDivisionCharRE = /[\w).+\-_$\]]/;

function parseFilters (exp) {
    var inSingle = false;
    var inDouble = false;
    var inTemplateString = false;
    var inRegex = false;
    var curly = 0;
    var square = 0;
    var paren = 0;
    var lastFilterIndex = 0;
    var c, prev, i, expression, filters;

    for (i = 0; i < exp.length; i++) {
    prev = c;
    c = exp.charCodeAt(i);
if (inSingle) {
if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
} else if (inDouble) {
if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
} else if (inTemplateString) {
if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
} else if (inRegex) {
if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
} else if (
c === 0x7C && // pipe
                 exp.charCodeAt(i + 1) !== 0x7C &&
exp.charCodeAt(i - 1) !== 0x7C &&
!curly && !square && !paren
) {
if (expression === undefined) {
// first filter, end of expression
lastFilterIndex = i + 1;
    expression = exp.slice(0, i).trim();
} else {
  pushFilter();
  }
} else {
switch (c) {
    case 0x22: inDouble = true; break         // "
case 0x27: inSingle = true; break         // '
case 0x60: inTemplateString = true; break // `
case 0x28: paren++; break                 // (
case 0x29: paren--; break                 // )
case 0x5B: square++; break                // [
          case 0x5D: square--; break                // ]
case 0x7B: curly++; break                 // {
    case 0x7D: curly--; break                 // }
}
if (c === 0x2f) { // /
var j = i - 1;
    var p = (void 0);
// find first non-whitespace prev char
for (; j >= 0; j--) {
    p = exp.charAt(j);
if (p !== ' ') { break }
}
if (!p || !validDivisionCharRE.test(p)) {
    inRegex = true;
}
}
}
}

if (expression === undefined) {
    expression = exp.slice(0, i).trim();
} else if (lastFilterIndex !== 0) {
pushFilter();
}

function pushFilter () {
(filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
    lastFilterIndex = i + 1;
}

if (filters) {
    for (i = 0; i < filters.length; i++) {
    expression = wrapFilter(expression, filters[i]);
}
}

return expression
}

function wrapFilter (exp, filter) {
    var i = filter.indexOf('(');
if (i < 0) {
// _f: resolveFilter
return ("_f(\"" + filter + "\")(" + exp + ")")
} else {
      var name = filter.slice(0, i);
      var args = filter.slice(i + 1);
      return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
  }
}

/*  */



/* eslint-disable no-unused-vars */
function baseWarn (msg, range) {
    console.error(("[Vue compiler]: " + msg));
}
/* eslint-enable no-unused-vars */

function pluckModuleFunction (
modules,
key
) {
return modules
      ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
: []
}

function addProp (el, name, value, range, dynamic) {
(el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
el.plain = false;
}

function addAttr (el, name, value, range, dynamic) {
    var attrs = dynamic
    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
: (el.attrs || (el.attrs = []));
attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
el.plain = false;
}

// add a raw attr (use this in preTransforms)
function addRawAttr (el, name, value, range) {
    el.attrsMap[name] = value;
el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
}

function addDirective (
el,
name,
rawName,
value,
arg,
isDynamicArg,
modifiers,
range
) {
(el.directives || (el.directives = [])).push(rangeSetItem({
    name: name,
    rawName: rawName,
    value: value,
    arg: arg,
    isDynamicArg: isDynamicArg,
    modifiers: modifiers
}, range));
el.plain = false;
}

function prependModifierMarker (symbol, name, dynamic) {
    return dynamic
    ? ("_p(" + name + ",\"" + symbol + "\")")
: symbol + name // mark the event as captured
}

function addHandler (
el,
name,
value,
modifiers,
important,
warn,
range,
dynamic
) {
    modifiers = modifiers || emptyObject;
// warn prevent and passive modifier
       /* istanbul ignore if */
   if (
warn &&
modifiers.prevent && modifiers.passive
) {
warn(
'passive and prevent can\'t be used together. ' +
'Passive handler can\'t prevent default event.',
range
);
}

// normalize click.right and click.middle since they don't actually fire
// this is technically browser-specific, but at least for now browsers are
// the only target envs that have right/middle clicks.
                                        if (modifiers.right) {
if (dynamic) {
    name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
} else if (name === 'click') {
    name = 'contextmenu';
    delete modifiers.right;
}
} else if (modifiers.middle) {
if (dynamic) {
    name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
} else if (name === 'click') {
    name = 'mouseup';
}
}

// check capture modifier
   if (modifiers.capture) {
    delete modifiers.capture;
    name = prependModifierMarker('!', name, dynamic);
}
if (modifiers.once) {
    delete modifiers.once;
    name = prependModifierMarker('~', name, dynamic);
}
/* istanbul ignore if */
if (modifiers.passive) {
    delete modifiers.passive;
    name = prependModifierMarker('&', name, dynamic);
}

var events;
if (modifiers.native) {
    delete modifiers.native;
events = el.nativeEvents || (el.nativeEvents = {});
} else {
events = el.events || (el.events = {});
}

var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
if (modifiers !== emptyObject) {
    newHandler.modifiers = modifiers;
}

var handlers = events[name];
/* istanbul ignore if */
if (Array.isArray(handlers)) {
    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
} else if (handlers) {
    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
} else {
      events[name] = newHandler;
  }

el.plain = false;
}

function getRawBindingAttr (
el,
name
) {
    return el.rawAttrsMap[':' + name] ||
    el.rawAttrsMap['v-bind:' + name] ||
    el.rawAttrsMap[name]
}

function getBindingAttr (
el,
name,
getStatic
) {
    var dynamicValue =
    getAndRemoveAttr(el, ':' + name) ||
    getAndRemoveAttr(el, 'v-bind:' + name);
if (dynamicValue != null) {
    return parseFilters(dynamicValue)
} else if (getStatic !== false) {
    var staticValue = getAndRemoveAttr(el, name);
if (staticValue != null) {
    return JSON.stringify(staticValue)
}
}
}

// note: this only removes the attr from the Array (attrsList) so that it
// doesn't get processed by processAttrs.
// By default it does NOT remove it from the map (attrsMap) because the map is
// needed during codegen.
   function getAndRemoveAttr (
el,
name,
removeFromMap
) {
    var val;
if ((val = el.attrsMap[name]) != null) {
    var list = el.attrsList;
    for (var i = 0, l = list.length; i < l; i++) {
if (list[i].name === name) {
    list.splice(i, 1);
    break
}
}
}
if (removeFromMap) {
    delete el.attrsMap[name];
}
return val
}

function getAndRemoveAttrByRegex (
el,
name
) {
    var list = el.attrsList;
    for (var i = 0, l = list.length; i < l; i++) {
    var attr = list[i];
if (name.test(attr.name)) {
    list.splice(i, 1);
    return attr
}
}
}

function rangeSetItem (
item,
range
) {
if (range) {
if (range.start != null) {
    item.start = range.start;
}
if (range.end != null) {
    item.end = range.end;
}
}
return item
}

/*  */

/**
   * Cross-platform code generation for component v-model
   */
function genComponentModel (
el,
value,
modifiers
) {
var ref = modifiers || {};
var number = ref.number;
var trim = ref.trim;

var baseValueExpression = '$$v';
var valueExpression = baseValueExpression;
if (trim) {
    valueExpression =
    "(typeof " + baseValueExpression + " === 'string'" +
    "? " + baseValueExpression + ".trim()" +
    ": " + baseValueExpression + ")";
}
if (number) {
    valueExpression = "_n(" + valueExpression + ")";
}
var assignment = genAssignmentCode(value, valueExpression);

el.model = {
    value: ("(" + value + ")"),
expression: JSON.stringify(value),
callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
};
}

/**
   * Cross-platform codegen helper for generating v-model value assignment code.
   */
function genAssignmentCode (
value,
assignment
) {
    var res = parseModel(value);
if (res.key === null) {
    return (value + "=" + assignment)
} else {
      return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
  }
}

/**
   * Parse a v-model expression into a base path and a final key segment.
   * Handles both dot-path and possible square brackets.
   *
   * Possible cases:
   *
   * - test
   * - test[key]
   * - test[test1[key]]
   * - test["a"][key]
   * - xxx.test[a[a].test1[key]]
   * - test.xxx.a["asa"][test1[key]]
   *
   */

var len, str, chr, index$1, expressionPos, expressionEndPos;



function parseModel (val) {
// Fix https://github.com/vuejs/vue/pull/7730
// allow v-model="obj.val " (trailing whitespace)
val = val.trim();
    len = val.length;

if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
    index$1 = val.lastIndexOf('.');
if (index$1 > -1) {
return {
    exp: val.slice(0, index$1),
    key: '"' + val.slice(index$1 + 1) + '"'
}
} else {
return {
    exp: val,
    key: null
}
}
}

str = val;
index$1 = expressionPos = expressionEndPos = 0;

while (!eof()) {
    chr = next();
/* istanbul ignore if */
if (isStringStart(chr)) {
parseString(chr);
} else if (chr === 0x5B) {
parseBracket(chr);
}
}

return {
    exp: val.slice(0, expressionPos),
    key: val.slice(expressionPos + 1, expressionEndPos)
}
}

function next () {
    return str.charCodeAt(++index$1)
}

function eof () {
    return index$1 >= len
}

function isStringStart (chr) {
    return chr === 0x22 || chr === 0x27
}

function parseBracket (chr) {
    var inBracket = 1;
    expressionPos = index$1;
while (!eof()) {
    chr = next();
if (isStringStart(chr)) {
parseString(chr);
    continue
}
if (chr === 0x5B) { inBracket++; }
if (chr === 0x5D) { inBracket--; }
if (inBracket === 0) {
    expressionEndPos = index$1;
    break
}
}
}

function parseString (chr) {
    var stringQuote = chr;
while (!eof()) {
    chr = next();
if (chr === stringQuote) {
    break
}
}
}

/*  */

var warn$1;

// in some cases, the event used has to be determined at runtime
// so we used some reserved tokens during compile.
   var RANGE_TOKEN = '__r';
var CHECKBOX_RADIO_TOKEN = '__c';

function model (
el,
dir,
_warn
) {
    warn$1 = _warn;
    var value = dir.value;
    var modifiers = dir.modifiers;
    var tag = el.tag;
    var type = el.attrsMap.type;

{
// inputs with type="file" are read only and setting the input's
// value will throw an error.
   if (tag === 'input' && type === 'file') {
    warn$1(
    "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
"File inputs are read only. Use a v-on:change listener instead.",
el.rawAttrsMap['v-model']
);
}
}

if (el.component) {
genComponentModel(el, value, modifiers);
// component v-model doesn't need extra runtime
return false
} else if (tag === 'select') {
genSelect(el, value, modifiers);
} else if (tag === 'input' && type === 'checkbox') {
genCheckboxModel(el, value, modifiers);
} else if (tag === 'input' && type === 'radio') {
genRadioModel(el, value, modifiers);
} else if (tag === 'input' || tag === 'textarea') {
genDefaultModel(el, value, modifiers);
} else if (!config.isReservedTag(tag)) {
genComponentModel(el, value, modifiers);
// component v-model doesn't need extra runtime
return false
} else {
      warn$1(
      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
  "v-model is not supported on this element type. " +
  'If you are working with contenteditable, it\'s recommended to ' +
  'wrap a library dedicated for that purpose inside a custom component.',
  el.rawAttrsMap['v-model']
  );
  }

// ensure runtime directive metadata
   return true
}

function genCheckboxModel (
el,
value,
modifiers
) {
    var number = modifiers && modifiers.number;
    var valueBinding = getBindingAttr(el, 'value') || 'null';
    var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
    var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
addProp(el, 'checked',
"Array.isArray(" + value + ")" +
"?_i(" + value + "," + valueBinding + ")>-1" + (
trueValueBinding === 'true'
? (":(" + value + ")")
: (":_q(" + value + "," + trueValueBinding + ")")
)
);
addHandler(el, 'change',
"var $$a=" + value + "," +
'$$el=$event.target,' +
"$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
'if(Array.isArray($$a)){' +
"var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
'$$i=_i($$a,$$v);' +
"if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
"else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
"}else{" + (genAssignmentCode(value, '$$c')) + "}",
null, true
);
}

function genRadioModel (
el,
value,
modifiers
) {
    var number = modifiers && modifiers.number;
    var valueBinding = getBindingAttr(el, 'value') || 'null';
    valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
}

function genSelect (
el,
value,
modifiers
) {
    var number = modifiers && modifiers.number;
    var selectedVal = "Array.prototype.filter" +
    ".call($event.target.options,function(o){return o.selected})" +
    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
    "return " + (number ? '_n(val)' : 'val') + "})";

    var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
    var code = "var $$selectedVal = " + selectedVal + ";";
    code = code + " " + (genAssignmentCode(value, assignment));
addHandler(el, 'change', code, null, true);
}

function genDefaultModel (
el,
value,
modifiers
) {
    var type = el.attrsMap.type;

// warn if v-bind:value conflicts with v-model
// except for inputs with v-bind:type
   {
       var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
       var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
if (value$1 && !typeBinding) {
    var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
    warn$1(
    binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
    'because the latter already expands to a value binding internally',
    el.rawAttrsMap[binding]
);
}
}

var ref = modifiers || {};
var lazy = ref.lazy;
var number = ref.number;
var trim = ref.trim;
var needCompositionGuard = !lazy && type !== 'range';
var event = lazy
      ? 'change'
: type === 'range'
? RANGE_TOKEN
  : 'input';

var valueExpression = '$event.target.value';
if (trim) {
    valueExpression = "$event.target.value.trim()";
}
if (number) {
    valueExpression = "_n(" + valueExpression + ")";
}

var code = genAssignmentCode(value, valueExpression);
if (needCompositionGuard) {
    code = "if($event.target.composing)return;" + code;
}

addProp(el, 'value', ("(" + value + ")"));
addHandler(el, event, code, null, true);
if (trim || number) {
addHandler(el, 'blur', '$forceUpdate()');
}
}

/*  */

// normalize v-model event tokens that can only be determined at runtime.
// it's important to place the event as the first in the array because
// the whole point is ensuring the v-model callback gets called before
// user-attached handlers.
   function normalizeEvents (on) {
/* istanbul ignore if */
if (isDef(on[RANGE_TOKEN])) {
// IE input[type=range] only supports `change` event
var event = isIE ? 'change' : 'input';
    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
    delete on[RANGE_TOKEN];
}
// This was originally intended to fix #4521 but no longer necessary
// after 2.5. Keeping it for backwards compat with generated code from < 2.4
/* istanbul ignore if */
if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
    delete on[CHECKBOX_RADIO_TOKEN];
}
}

var target$1;

function createOnceHandler$1 (event, handler, capture) {
    var _target = target$1; // save current target element in closure
                               return function onceHandler () {
    var res = handler.apply(null, arguments);
if (res !== null) {
    remove$2(event, onceHandler, capture, _target);
}
}
}

// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
// implementation and does not fire microtasks in between event propagation, so
// safe to exclude.
   var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);

function add$1 (
name,
handler,
capture,
passive
) {
// async edge case #6566: inner click event triggers patch, event handler
// attached to outer element during patch, and triggered again. This
// happens because browsers fire microtask ticks between event propagation.
// the solution is simple: we save the timestamp when a handler is attached,
// and the handler would only fire if the event passed to it was fired
// AFTER it was attached.
   if (useMicrotaskFix) {
    var attachedTimestamp = currentFlushTimestamp;
    var original = handler;
handler = original._wrapper = function (e) {
if (
// no bubbling, should always fire.
// this is just a safety net in case event.timeStamp is unreliable in
// certain weird environments...
   e.target === e.currentTarget ||
// event is fired after handler attachment
   e.timeStamp >= attachedTimestamp ||
// #9462 bail for iOS 9 bug: event.timeStamp is 0 after history.pushState
                                                  e.timeStamp === 0 ||
// #9448 bail if event is fired in another document in a multi-page
// electron/nw.js app, since event.timeStamp will be using a different
// starting reference
   e.target.ownerDocument !== document
) {
    return original.apply(this, arguments)
}
};
}
target$1.addEventListener(
name,
handler,
supportsPassive
        ? { capture: capture, passive: passive }
: capture
);
}

function remove$2 (
name,
handler,
capture,
_target
) {
(_target || target$1).removeEventListener(
name,
handler._wrapper || handler,
capture
);
}

function updateDOMListeners (oldVnode, vnode) {
if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
    return
}
var on = vnode.data.on || {};
var oldOn = oldVnode.data.on || {};
target$1 = vnode.elm;
normalizeEvents(on);
updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
target$1 = undefined;
}

var events = {
    create: updateDOMListeners,
    update: updateDOMListeners
};

/*  */

var svgContainer;

function updateDOMProps (oldVnode, vnode) {
if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
    return
}
var key, cur;
var elm = vnode.elm;
var oldProps = oldVnode.data.domProps || {};
var props = vnode.data.domProps || {};
// clone observed objects, as the user probably wants to mutate it
if (isDef(props.__ob__)) {
props = vnode.data.domProps = extend({}, props);
}

for (key in oldProps) {
if (isUndef(props[key])) {
    elm[key] = '';
}
}
for (key in props) {
    cur = props[key];
// ignore children if the node has textContent or innerHTML,
// as these will throw away existing DOM nodes and cause removal errors
// on subsequent patches (#3360)
if (key === 'textContent' || key === 'innerHTML') {
if (vnode.children) { vnode.children.length = 0; }
if (cur === oldProps[key]) { continue }
// #6601 work around Chrome version <= 55 bug where single textNode
// replaced by innerHTML/textContent retains its parentNode property
                         if (elm.childNodes.length === 1) {
    elm.removeChild(elm.childNodes[0]);
}
}

if (key === 'value' && elm.tagName !== 'PROGRESS') {
// store value as _value as well since
// non-string values will be stringified
elm._value = cur;
// avoid resetting cursor position when value is the same
var strCur = isUndef(cur) ? '' : String(cur);
if (shouldUpdateValue(elm, strCur)) {
    elm.value = strCur;
}
} else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
// IE doesn't support innerHTML for SVG elements
svgContainer = svgContainer || document.createElement('div');
    svgContainer.innerHTML = "<svg>" + cur + "</svg>";
    var svg = svgContainer.firstChild;
while (elm.firstChild) {
    elm.removeChild(elm.firstChild);
}
while (svg.firstChild) {
    elm.appendChild(svg.firstChild);
}
} else if (
// skip the update if old and new VDOM state is the same.
// `value` is handled separately because the DOM value may be temporarily
// out of sync with VDOM state due to focus, composition and modifiers.
// This  #4521 by skipping the unnecesarry `checked` update.
   cur !== oldProps[key]
) {
// some property updates can throw
// e.g. `value` on <progress> w/ non-finite value
                                 try {
                                     elm[key] = cur;
                                 } catch (e) {}
}
}
}

// check platforms/web/util/attrs.js acceptValue


                            function shouldUpdateValue (elm, checkVal) {
    return (!elm.composing && (
    elm.tagName === 'OPTION' ||
    isNotInFocusAndDirty(elm, checkVal) ||
    isDirtyWithModifiers(elm, checkVal)
))
}

function isNotInFocusAndDirty (elm, checkVal) {
// return true when textbox (.number and .trim) loses focus and its value is
// not equal to the updated value
var notInFocus = true;
// #6157
// work around IE bug when accessing document.activeElement in an iframe
   try { notInFocus = document.activeElement !== elm; } catch (e) {}
return notInFocus && elm.value !== checkVal
}

function isDirtyWithModifiers (elm, newVal) {
    var value = elm.value;
    var modifiers = elm._vModifiers; // injected by v-model runtime
                                        if (isDef(modifiers)) {
if (modifiers.number) {
    return toNumber(value) !== toNumber(newVal)
}
if (modifiers.trim) {
    return value.trim() !== newVal.trim()
}
}
return value !== newVal
}

var domProps = {
    create: updateDOMProps,
    update: updateDOMProps
};

/*  */

var parseStyleText = cached(function (cssText) {
var res = {};
var listDelimiter = /;(?![^(]*\))/g;
var propertyDelimiter = /:(.+)/;
cssText.split(listDelimiter).forEach(function (item) {
if (item) {
    var tmp = item.split(propertyDelimiter);
    tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
}
});
return res
});

// merge static and dynamic style data on the same vnode
   function normalizeStyleData (data) {
    var style = normalizeStyleBinding(data.style);
// static style is pre-processed into an object during compilation
// and is always a fresh object, so it's safe to merge into it
return data.staticStyle
? extend(data.staticStyle, style)
: style
}

// normalize possible array / string values into Object
                              function normalizeStyleBinding (bindingStyle) {
if (Array.isArray(bindingStyle)) {
    return toObject(bindingStyle)
}
if (typeof bindingStyle === 'string') {
    return parseStyleText(bindingStyle)
}
return bindingStyle
}

/**
   * parent component style should be after child's
   * so that parent component's style could override it
   */
function getStyle (vnode, checkChild) {
var res = {};
var styleData;

if (checkChild) {
    var childNode = vnode;
while (childNode.componentInstance) {
    childNode = childNode.componentInstance._vnode;
if (
childNode && childNode.data &&
(styleData = normalizeStyleData(childNode.data))
) {
extend(res, styleData);
}
}
}

if ((styleData = normalizeStyleData(vnode.data))) {
extend(res, styleData);
}

var parentNode = vnode;
while ((parentNode = parentNode.parent)) {
if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
extend(res, styleData);
}
}
return res
}

/*  */

var cssVarRE = /^--/;
var importantRE = /\s*!important$/;
var setProp = function (el, name, val) {
/* istanbul ignore if */
if (cssVarRE.test(name)) {
    el.style.setProperty(name, val);
} else if (importantRE.test(val)) {
    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
} else {
      var normalizedName = normalize(name);
if (Array.isArray(val)) {
// Support values array created by autoprefixer, e.g.
// {display: ["-webkit-box", "-ms-flexbox", "flex"]}
// Set them one by one, and the browser will only set those it can recognize
for (var i = 0, len = val.length; i < len; i++) {
    el.style[normalizedName] = val[i];
}
} else {
      el.style[normalizedName] = val;
  }
}
};

var vendorNames = ['Webkit', 'Moz', 'ms'];

var emptyStyle;
var normalize = cached(function (prop) {
    emptyStyle = emptyStyle || document.createElement('div').style;
    prop = camelize(prop);
if (prop !== 'filter' && (prop in emptyStyle)) {
    return prop
}
var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
for (var i = 0; i < vendorNames.length; i++) {
    var name = vendorNames[i] + capName;
if (name in emptyStyle) {
    return name
}
}
});

function updateStyle (oldVnode, vnode) {
    var data = vnode.data;
    var oldData = oldVnode.data;

if (isUndef(data.staticStyle) && isUndef(data.style) &&
isUndef(oldData.staticStyle) && isUndef(oldData.style)
) {
    return
}

var cur, name;
var el = vnode.elm;
var oldStaticStyle = oldData.staticStyle;
var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};

// if static style exists, stylebinding already merged into it when doing normalizeStyleData
var oldStyle = oldStaticStyle || oldStyleBinding;

var style = normalizeStyleBinding(vnode.data.style) || {};

// store normalized style under a different key for next diff
// make sure to clone it if it's reactive, since the user likely wants
// to mutate it.
   vnode.data.normalizedStyle = isDef(style.__ob__)
? extend({}, style)
: style;

var newStyle = getStyle(vnode, true);

for (name in oldStyle) {
if (isUndef(newStyle[name])) {
setProp(el, name, '');
}
}
for (name in newStyle) {
    cur = newStyle[name];
if (cur !== oldStyle[name]) {
// ie9 setting to null has no effect, must use empty string
setProp(el, name, cur == null ? '' : cur);
}
}
}

var style = {
    create: updateStyle,
    update: updateStyle
};

/*  */

var whitespaceRE = /\s+/;

/**
   * Add class with compatibility for SVG since classList is not supported on
   * SVG elements in IE
   */
function addClass (el, cls) {
/* istanbul ignore if */
if (!cls || !(cls = cls.trim())) {
    return
}

/* istanbul ignore else */
if (el.classList) {
if (cls.indexOf(' ') > -1) {
cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
} else {
      el.classList.add(cls);
  }
} else {
      var cur = " " + (el.getAttribute('class') || '') + " ";
if (cur.indexOf(' ' + cls + ' ') < 0) {
    el.setAttribute('class', (cur + cls).trim());
}
}
}

/**
   * Remove class with compatibility for SVG since classList is not supported on
   * SVG elements in IE
   */
function removeClass (el, cls) {
/* istanbul ignore if */
if (!cls || !(cls = cls.trim())) {
    return
}

/* istanbul ignore else */
if (el.classList) {
if (cls.indexOf(' ') > -1) {
cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
} else {
      el.classList.remove(cls);
  }
if (!el.classList.length) {
    el.removeAttribute('class');
}
} else {
      var cur = " " + (el.getAttribute('class') || '') + " ";
      var tar = ' ' + cls + ' ';
while (cur.indexOf(tar) >= 0) {
    cur = cur.replace(tar, ' ');
}
cur = cur.trim();
if (cur) {
    el.setAttribute('class', cur);
} else {
      el.removeAttribute('class');
  }
}
}

/*  */

function resolveTransition (def$$1) {
if (!def$$1) {
    return
}
/* istanbul ignore else */
if (typeof def$$1 === 'object') {
var res = {};
if (def$$1.css !== false) {
extend(res, autoCssTransition(def$$1.name || 'v'));
}
extend(res, def$$1);
return res
} else if (typeof def$$1 === 'string') {
    return autoCssTransition(def$$1)
}
}

var autoCssTransition = cached(function (name) {
return {
    enterClass: (name + "-enter"),
enterToClass: (name + "-enter-to"),
enterActiveClass: (name + "-enter-active"),
leaveClass: (name + "-leave"),
leaveToClass: (name + "-leave-to"),
leaveActiveClass: (name + "-leave-active")
}
});

var hasTransition = inBrowser && !isIE9;
var TRANSITION = 'transition';
var ANIMATION = 'animation';

// Transition property/event sniffing
                       var transitionProp = 'transition';
var transitionEndEvent = 'transitionend';
var animationProp = 'animation';
var animationEndEvent = 'animationend';
if (hasTransition) {
/* istanbul ignore if */
if (window.ontransitionend === undefined &&
window.onwebkittransitionend !== undefined
) {
    transitionProp = 'WebkitTransition';
    transitionEndEvent = 'webkitTransitionEnd';
}
if (window.onanimationend === undefined &&
window.onwebkitanimationend !== undefined
) {
    animationProp = 'WebkitAnimation';
    animationEndEvent = 'webkitAnimationEnd';
}
}

// binding to window is necessary to make hot reload work in IE in strict mode
   var raf = inBrowser
    ? window.requestAnimationFrame
? window.requestAnimationFrame.bind(window)
: setTimeout
: /* istanbul ignore next */ function (fn) { return fn(); };

function nextFrame (fn) {
raf(function () {
raf(fn);
});
}

function addTransitionClass (el, cls) {
    var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
if (transitionClasses.indexOf(cls) < 0) {
    transitionClasses.push(cls);
addClass(el, cls);
}
}

function removeTransitionClass (el, cls) {
if (el._transitionClasses) {
remove(el._transitionClasses, cls);
}
removeClass(el, cls);
}

function whenTransitionEnds (
el,
expectedType,
cb
) {
    var ref = getTransitionInfo(el, expectedType);
    var type = ref.type;
    var timeout = ref.timeout;
    var propCount = ref.propCount;
if (!type) { return cb() }
var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
var ended = 0;
var end = function () {
    el.removeEventListener(event, onEnd);
cb();
};
var onEnd = function (e) {
if (e.target === el) {
if (++ended >= propCount) {
end();
}
}
};
setTimeout(function () {
if (ended < propCount) {
end();
}
}, timeout + 1);
el.addEventListener(event, onEnd);
}

var transformRE = /\b(transform|all)(,|$)/;

function getTransitionInfo (el, expectedType) {
    var styles = window.getComputedStyle(el);
// JSDOM may return undefined for transition properties
var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
    var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
    var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
    var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
    var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
    var animationTimeout = getTimeout(animationDelays, animationDurations);

    var type;
    var timeout = 0;
    var propCount = 0;
/* istanbul ignore if */
if (expectedType === TRANSITION) {
if (transitionTimeout > 0) {
    type = TRANSITION;
    timeout = transitionTimeout;
    propCount = transitionDurations.length;
}
} else if (expectedType === ANIMATION) {
if (animationTimeout > 0) {
    type = ANIMATION;
    timeout = animationTimeout;
    propCount = animationDurations.length;
}
} else {
      timeout = Math.max(transitionTimeout, animationTimeout);
      type = timeout > 0
      ? transitionTimeout > animationTimeout
      ? TRANSITION
    : ANIMATION
    : null;
      propCount = type
      ? type === TRANSITION
      ? transitionDurations.length
    : animationDurations.length
    : 0;
  }
var hasTransform =
type === TRANSITION &&
transformRE.test(styles[transitionProp + 'Property']);
return {
    type: type,
    timeout: timeout,
    propCount: propCount,
    hasTransform: hasTransform
}
}

function getTimeout (delays, durations) {
/* istanbul ignore next */
while (delays.length < durations.length) {
    delays = delays.concat(delays);
}

return Math.max.apply(null, durations.map(function (d, i) {
    return toMs(d) + toMs(delays[i])
}))
}

// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
// in a locale-dependent way, using a comma instead of a dot.
// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
// as a floor function) causing unexpected behaviors
                        function toMs (s) {
    return Number(s.slice(0, -1).replace(',', '.')) * 1000
}

/*  */

function enter (vnode, toggleDisplay) {
    var el = vnode.elm;

// call leave callback now
   if (isDef(el._leaveCb)) {
    el._leaveCb.cancelled = true;
    el._leaveCb();
}

var data = resolveTransition(vnode.data.transition);
if (isUndef(data)) {
    return
}

/* istanbul ignore if */
if (isDef(el._enterCb) || el.nodeType !== 1) {
    return
}

var css = data.css;
var type = data.type;
var enterClass = data.enterClass;
var enterToClass = data.enterToClass;
var enterActiveClass = data.enterActiveClass;
var appearClass = data.appearClass;
var appearToClass = data.appearToClass;
var appearActiveClass = data.appearActiveClass;
var beforeEnter = data.beforeEnter;
var enter = data.enter;
var afterEnter = data.afterEnter;
var enterCancelled = data.enterCancelled;
var beforeAppear = data.beforeAppear;
var appear = data.appear;
var afterAppear = data.afterAppear;
var appearCancelled = data.appearCancelled;
var duration = data.duration;

// activeInstance will always be the <transition> component managing this
// transition. One edge case to check is when the <transition> is placed
// as the root node of a child component. In that case we need to check
// <transition>'s parent for appear check.
var context = activeInstance;
var transitionNode = activeInstance.$vnode;
while (transitionNode && transitionNode.parent) {
    transitionNode = transitionNode.parent;
    context = transitionNode.context;
}

var isAppear = !context._isMounted || !vnode.isRootInsert;

if (isAppear && !appear && appear !== '') {
    return
}

var startClass = isAppear && appearClass
      ? appearClass
                             : enterClass;
var activeClass = isAppear && appearActiveClass
      ? appearActiveClass
                              : enterActiveClass;
var toClass = isAppear && appearToClass
      ? appearToClass
                          : enterToClass;

var beforeEnterHook = isAppear
      ? (beforeAppear || beforeEnter)
: beforeEnter;
var enterHook = isAppear
      ? (typeof appear === 'function' ? appear : enter)
: enter;
var afterEnterHook = isAppear
      ? (afterAppear || afterEnter)
: afterEnter;
var enterCancelledHook = isAppear
      ? (appearCancelled || enterCancelled)
: enterCancelled;

var explicitEnterDuration = toNumber(
isObject(duration)
? duration.enter
  : duration
);

if (explicitEnterDuration != null) {
checkDuration(explicitEnterDuration, 'enter', vnode);
}

var expectsCSS = css !== false && !isIE9;
var userWantsControl = getHookArgumentsLength(enterHook);

var cb = el._enterCb = once(function () {
if (expectsCSS) {
removeTransitionClass(el, toClass);
removeTransitionClass(el, activeClass);
}
if (cb.cancelled) {
if (expectsCSS) {
removeTransitionClass(el, startClass);
}
enterCancelledHook && enterCancelledHook(el);
} else {
      afterEnterHook && afterEnterHook(el);
  }
el._enterCb = null;
});

if (!vnode.data.show) {
// remove pending leave element on enter by injecting an insert hook
mergeVNodeHook(vnode, 'insert', function () {
    var parent = el.parentNode;
    var pendingNode = parent && parent._pending && parent._pending[vnode.key];
if (pendingNode &&
pendingNode.tag === vnode.tag &&
pendingNode.elm._leaveCb
) {
    pendingNode.elm._leaveCb();
}
enterHook && enterHook(el, cb);
});
}

// start enter transition
   beforeEnterHook && beforeEnterHook(el);
if (expectsCSS) {
addTransitionClass(el, startClass);
addTransitionClass(el, activeClass);
nextFrame(function () {
removeTransitionClass(el, startClass);
if (!cb.cancelled) {
addTransitionClass(el, toClass);
if (!userWantsControl) {
if (isValidDuration(explicitEnterDuration)) {
setTimeout(cb, explicitEnterDuration);
} else {
  whenTransitionEnds(el, type, cb);
  }
}
}
});
}

if (vnode.data.show) {
    toggleDisplay && toggleDisplay();
    enterHook && enterHook(el, cb);
}

if (!expectsCSS && !userWantsControl) {
cb();
}
}

function leave (vnode, rm) {
    var el = vnode.elm;

// call enter callback now
   if (isDef(el._enterCb)) {
    el._enterCb.cancelled = true;
    el._enterCb();
}

var data = resolveTransition(vnode.data.transition);
if (isUndef(data) || el.nodeType !== 1) {
    return rm()
}

/* istanbul ignore if */
if (isDef(el._leaveCb)) {
    return
}

var css = data.css;
var type = data.type;
var leaveClass = data.leaveClass;
var leaveToClass = data.leaveToClass;
var leaveActiveClass = data.leaveActiveClass;
var beforeLeave = data.beforeLeave;
var leave = data.leave;
var afterLeave = data.afterLeave;
var leaveCancelled = data.leaveCancelled;
var delayLeave = data.delayLeave;
var duration = data.duration;

var expectsCSS = css !== false && !isIE9;
var userWantsControl = getHookArgumentsLength(leave);

var explicitLeaveDuration = toNumber(
isObject(duration)
? duration.leave
  : duration
);

if (isDef(explicitLeaveDuration)) {
checkDuration(explicitLeaveDuration, 'leave', vnode);
}

var cb = el._leaveCb = once(function () {
if (el.parentNode && el.parentNode._pending) {
    el.parentNode._pending[vnode.key] = null;
}
if (expectsCSS) {
removeTransitionClass(el, leaveToClass);
removeTransitionClass(el, leaveActiveClass);
}
if (cb.cancelled) {
if (expectsCSS) {
removeTransitionClass(el, leaveClass);
}
leaveCancelled && leaveCancelled(el);
} else {
  rm();
      afterLeave && afterLeave(el);
  }
el._leaveCb = null;
});

if (delayLeave) {
delayLeave(performLeave);
} else {
  performLeave();
  }

function performLeave () {
// the delayed leave may have already been cancelled
   if (cb.cancelled) {
    return
}
// record leaving element
   if (!vnode.data.show && el.parentNode) {
(el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
}
beforeLeave && beforeLeave(el);
if (expectsCSS) {
addTransitionClass(el, leaveClass);
addTransitionClass(el, leaveActiveClass);
nextFrame(function () {
removeTransitionClass(el, leaveClass);
if (!cb.cancelled) {
addTransitionClass(el, leaveToClass);
if (!userWantsControl) {
if (isValidDuration(explicitLeaveDuration)) {
setTimeout(cb, explicitLeaveDuration);
} else {
  whenTransitionEnds(el, type, cb);
  }
}
}
});
}
leave && leave(el, cb);
if (!expectsCSS && !userWantsControl) {
cb();
}
}
}

// only used in dev mode
   function checkDuration (val, name, vnode) {
if (typeof val !== 'number') {
warn(
"<transition> explicit " + name + " duration is not a valid number - " +
"got " + (JSON.stringify(val)) + ".",
vnode.context
);
} else if (isNaN(val)) {
warn(
"<transition> explicit " + name + " duration is NaN - " +
'the duration expression might be incorrect.',
vnode.context
);
}
}

function isValidDuration (val) {
    return typeof val === 'number' && !isNaN(val)
}

/**
   * Normalize a transition hook's argument length. The hook may be:
   * - a merged hook (invoker) with the original in .fns
   * - a wrapped component method (check ._length)
   * - a plain function (.length)
   */
function getHookArgumentsLength (fn) {
if (isUndef(fn)) {
    return false
}
var invokerFns = fn.fns;
if (isDef(invokerFns)) {
// invoker
return getHookArgumentsLength(
Array.isArray(invokerFns)
? invokerFns[0]
: invokerFns
)
} else {
      return (fn._length || fn.length) > 1
  }
}

function _enter (_, vnode) {
if (vnode.data.show !== true) {
enter(vnode);
}
}

var transition = inBrowser ? {
create: _enter,
activate: _enter,
remove: function remove$$1 (vnode, rm) {
/* istanbul ignore else */
if (vnode.data.show !== true) {
leave(vnode, rm);
} else {
  rm();
  }
}
} : {};

var platformModules = [
    attrs,
                      klass,
                      events,
                      domProps,
                      style,
                      transition
];

/*  */

// the directive module should be applied last, after all
// built-in modules have been applied.
   var modules = platformModules.concat(baseModules);

var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });

/**
   * Not type checking this file because flow doesn't like attaching
   * properties to Elements.
   */

/* istanbul ignore if */
if (isIE9) {
// http://www.matts411.com/post/internet-explorer-9-oninput/
document.addEventListener('selectionchange', function () {
    var el = document.activeElement;
if (el && el.vmodel) {
trigger(el, 'input');
}
});
}

var directive = {
inserted: function inserted (el, binding, vnode, oldVnode) {
if (vnode.tag === 'select') {
// #6903
   if (oldVnode.elm && !oldVnode.elm._vOptions) {
mergeVNodeHook(vnode, 'postpatch', function () {
    directive.componentUpdated(el, binding, vnode);
});
} else {
  setSelected(el, binding, vnode.context);
  }
el._vOptions = [].map.call(el.options, getValue);
} else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
    el._vModifiers = binding.modifiers;
if (!binding.modifiers.lazy) {
    el.addEventListener('compositionstart', onCompositionStart);
    el.addEventListener('compositionend', onCompositionEnd);
// Safari < 10.2 & UIWebView doesn't fire compositionend when
// switching focus before confirming composition choice
// this also fixes the issue where some browsers e.g. iOS Chrome
// fires "change" instead of "input" on autocomplete.
el.addEventListener('change', onCompositionEnd);
/* istanbul ignore if */
if (isIE9) {
    el.vmodel = true;
}
}
}
},

componentUpdated: function componentUpdated (el, binding, vnode) {
if (vnode.tag === 'select') {
setSelected(el, binding, vnode.context);
// in case the options rendered by v-for have changed,
// it's possible that the value is out-of-sync with the rendered options.
// detect such cases and filter out values that no longer has a matching
// option in the DOM.
var prevOptions = el._vOptions;
    var curOptions = el._vOptions = [].map.call(el.options, getValue);
if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
// trigger change event if
// no matching option found for at least one value
   var needReset = el.multiple
? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
: binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
if (needReset) {
trigger(el, 'change');
}
}
}
}
};

function setSelected (el, binding, vm) {
actuallySetSelected(el, binding, vm);
/* istanbul ignore if */
if (isIE || isEdge) {
setTimeout(function () {
actuallySetSelected(el, binding, vm);
}, 0);
}
}

function actuallySetSelected (el, binding, vm) {
    var value = binding.value;
    var isMultiple = el.multiple;
if (isMultiple && !Array.isArray(value)) {
warn(
"<select multiple v-model=\"" + (binding.expression) + "\"> " +
"expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
vm
);
    return
}
var selected, option;
for (var i = 0, l = el.options.length; i < l; i++) {
    option = el.options[i];
if (isMultiple) {
    selected = looseIndexOf(value, getValue(option)) > -1;
if (option.selected !== selected) {
    option.selected = selected;
}
} else {
if (looseEqual(getValue(option), value)) {
if (el.selectedIndex !== i) {
    el.selectedIndex = i;
}
return
}
}
}
if (!isMultiple) {
    el.selectedIndex = -1;
}
}

function hasNoMatchingOption (value, options) {
return options.every(function (o) { return !looseEqual(o, value); })
}

function getValue (option) {
    return '_value' in option
    ? option._value
: option.value
}

function onCompositionStart (e) {
    e.target.composing = true;
}

function onCompositionEnd (e) {
// prevent triggering an input event for no reason
   if (!e.target.composing) { return }
e.target.composing = false;
trigger(e.target, 'input');
}

function trigger (el, type) {
    var e = document.createEvent('HTMLEvents');
    e.initEvent(type, true, true);
    el.dispatchEvent(e);
}

/*  */

// recursively search for possible transition defined inside the component root
   function locateNode (vnode) {
    return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
? locateNode(vnode.componentInstance._vnode)
: vnode
}

var show = {
bind: function bind (el, ref, vnode) {
    var value = ref.value;

    vnode = locateNode(vnode);
    var transition$$1 = vnode.data && vnode.data.transition;
    var originalDisplay = el.__vOriginalDisplay =
    el.style.display === 'none' ? '' : el.style.display;
if (value && transition$$1) {
    vnode.data.show = true;
enter(vnode, function () {
    el.style.display = originalDisplay;
});
} else {
      el.style.display = value ? originalDisplay : 'none';
  }
},

update: function update (el, ref, vnode) {
    var value = ref.value;
    var oldValue = ref.oldValue;

/* istanbul ignore if */
if (!value === !oldValue) { return }
vnode = locateNode(vnode);
var transition$$1 = vnode.data && vnode.data.transition;
if (transition$$1) {
    vnode.data.show = true;
if (value) {
enter(vnode, function () {
    el.style.display = el.__vOriginalDisplay;
});
} else {
leave(vnode, function () {
    el.style.display = 'none';
});
}
} else {
      el.style.display = value ? el.__vOriginalDisplay : 'none';
  }
},

unbind: function unbind (
el,
binding,
vnode,
oldVnode,
isDestroy
) {
if (!isDestroy) {
    el.style.display = el.__vOriginalDisplay;
}
}
};

var platformDirectives = {
    model: directive,
    show: show
};

/*  */

var transitionProps = {
    name: String,
    appear: Boolean,
    css: Boolean,
    mode: String,
    type: String,
    enterClass: String,
    leaveClass: String,
    enterToClass: String,
    leaveToClass: String,
    enterActiveClass: String,
    leaveActiveClass: String,
    appearClass: String,
    appearActiveClass: String,
    appearToClass: String,
    duration: [Number, String, Object]
};

// in case the child is also an abstract component, e.g. <keep-alive>
// we want to recursively retrieve the real component to be rendered
   function getRealChild (vnode) {
    var compOptions = vnode && vnode.componentOptions;
if (compOptions && compOptions.Ctor.options.abstract) {
    return getRealChild(getFirstComponentChild(compOptions.children))
} else {
      return vnode
  }
}

function extractTransitionData (comp) {
var data = {};
var options = comp.$options;
// props
   for (var key in options.propsData) {
    data[key] = comp[key];
}
// events.
// extract listeners and pass them directly to the transition methods
   var listeners = options._parentListeners;
for (var key$1 in listeners) {
    data[camelize(key$1)] = listeners[key$1];
}
return data
}

function placeholder (h, rawChild) {
if (/\d-keep-alive$/.test(rawChild.tag)) {
return h('keep-alive', {
    props: rawChild.componentOptions.propsData
})
}
}

function hasParentTransition (vnode) {
while ((vnode = vnode.parent)) {
if (vnode.data.transition) {
    return true
}
}
}

function isSameChild (child, oldChild) {
    return oldChild.key === child.key && oldChild.tag === child.tag
}

var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };

var isVShowDirective = function (d) { return d.name === 'show'; };

var Transition = {
name: 'transition',
props: transitionProps,
abstract: true,

render: function render (h) {
    var this$1 = this;

    var children = this.$slots.default;
if (!children) {
    return
}

// filter out text nodes (possible whitespaces)
children = children.filter(isNotTextNode);
/* istanbul ignore if */
if (!children.length) {
    return
}

// warn multiple elements
   if (children.length > 1) {
warn(
'<transition> can only be used on a single element. Use ' +
'<transition-group> for lists.',
this.$parent
);
}

var mode = this.mode;

// warn invalid mode
   if (mode && mode !== 'in-out' && mode !== 'out-in'
) {
warn(
'invalid <transition> mode: ' + mode,
this.$parent
);
}

var rawChild = children[0];

// if this is a component root node and the component's
// parent container node also has transition, skip.
if (hasParentTransition(this.$vnode)) {
    return rawChild
}

// apply transition data to child
// use getRealChild() to ignore abstract components e.g. keep-alive
                      var child = getRealChild(rawChild);
/* istanbul ignore if */
if (!child) {
    return rawChild
}

if (this._leaving) {
    return placeholder(h, rawChild)
}

// ensure a key that is unique to the vnode type and to this transition
// component instance. This key will be used to remove pending leaving nodes
// during entering.
   var id = "__transition-" + (this._uid) + "-";
child.key = child.key == null
        ? child.isComment
? id + 'comment'
: id + child.tag
: isPrimitive(child.key)
? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
: child.key;

var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
var oldRawChild = this._vnode;
var oldChild = getRealChild(oldRawChild);

// mark v-show
// so that the transition module can hand over the control to the directive
   if (child.data.directives && child.data.directives.some(isVShowDirective)) {
    child.data.show = true;
}

if (
oldChild &&
oldChild.data &&
!isSameChild(child, oldChild) &&
!isAsyncPlaceholder(oldChild) &&
// #6687 component root is a comment node
        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
) {
// replace old child transition data with fresh one
// important for dynamic transitions!
   var oldData = oldChild.data.transition = extend({}, data);
// handle transition mode
   if (mode === 'out-in') {
// return placeholder node and queue update when leave finishes
this._leaving = true;
mergeVNodeHook(oldData, 'afterLeave', function () {
    this$1._leaving = false;
    this$1.$forceUpdate();
});
return placeholder(h, rawChild)
} else if (mode === 'in-out') {
if (isAsyncPlaceholder(child)) {
    return oldRawChild
}
var delayedLeave;
var performLeave = function () { delayedLeave(); };
mergeVNodeHook(data, 'afterEnter', performLeave);
mergeVNodeHook(data, 'enterCancelled', performLeave);
mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
}
}

return rawChild
}
};

/*  */

var props = extend({
    tag: String,
    moveClass: String
}, transitionProps);

delete props.mode;

var TransitionGroup = {
props: props,

beforeMount: function beforeMount () {
    var this$1 = this;

    var update = this._update;
this._update = function (vnode, hydrating) {
    var restoreActiveInstance = setActiveInstance(this$1);
// force removing pass
this$1.__patch__(
this$1._vnode,
this$1.kept,
false, // hydrating
true // removeOnly (!important, avoids unnecessary moves)
);
    this$1._vnode = this$1.kept;
restoreActiveInstance();
    update.call(this$1, vnode, hydrating);
};
},

render: function render (h) {
    var tag = this.tag || this.$vnode.data.tag || 'span';
    var map = Object.create(null);
    var prevChildren = this.prevChildren = this.children;
    var rawChildren = this.$slots.default || [];
    var children = this.children = [];
    var transitionData = extractTransitionData(this);

    for (var i = 0; i < rawChildren.length; i++) {
    var c = rawChildren[i];
if (c.tag) {
if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
    children.push(c);
    map[c.key] = c
;(c.data || (c.data = {})).transition = transitionData;
} else {
      var opts = c.componentOptions;
      var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
  warn(("<transition-group> children must be keyed: <" + name + ">"));
  }
}
}

if (prevChildren) {
    var kept = [];
    var removed = [];
    for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
    var c$1 = prevChildren[i$1];
    c$1.data.transition = transitionData;
    c$1.data.pos = c$1.elm.getBoundingClientRect();
if (map[c$1.key]) {
    kept.push(c$1);
} else {
      removed.push(c$1);
  }
}
this.kept = h(tag, null, kept);
this.removed = removed;
}

return h(tag, null, children)
},

updated: function updated () {
    var children = this.prevChildren;
    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
    return
}

// we divide the work into three loops to avoid mixing DOM reads and writes
// in each iteration - which helps prevent layout thrashing.
                       children.forEach(callPendingCbs);
children.forEach(recordPosition);
children.forEach(applyTranslation);

// force reflow to put everything in position
// assign to this to avoid being removed in tree-shaking
// $flow-disable-line
    this._reflow = document.body.offsetHeight;

children.forEach(function (c) {
if (c.data.moved) {
    var el = c.elm;
    var s = el.style;
addTransitionClass(el, moveClass);
    s.transform = s.WebkitTransform = s.transitionDuration = '';
el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
if (e && e.target !== el) {
    return
}
if (!e || /transform$/.test(e.propertyName)) {
    el.removeEventListener(transitionEndEvent, cb);
    el._moveCb = null;
removeTransitionClass(el, moveClass);
}
});
}
});
},

methods: {
hasMove: function hasMove (el, moveClass) {
/* istanbul ignore if */
if (!hasTransition) {
    return false
}
/* istanbul ignore if */
if (this._hasMove) {
    return this._hasMove
}
// Detect whether an element with the move class applied has
// CSS transitions. Since the element may be inside an entering
// transition at this very moment, we make a clone of it and remove
// all other transition classes applied to ensure only the move class
// is applied.
   var clone = el.cloneNode();
if (el._transitionClasses) {
el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
}
addClass(clone, moveClass);
clone.style.display = 'none';
this.$el.appendChild(clone);
var info = getTransitionInfo(clone);
this.$el.removeChild(clone);
return (this._hasMove = info.hasTransform)
}
}
};

function callPendingCbs (c) {
/* istanbul ignore if */
if (c.elm._moveCb) {
    c.elm._moveCb();
}
/* istanbul ignore if */
if (c.elm._enterCb) {
    c.elm._enterCb();
}
}

function recordPosition (c) {
    c.data.newPos = c.elm.getBoundingClientRect();
}

function applyTranslation (c) {
    var oldPos = c.data.pos;
    var newPos = c.data.newPos;
    var dx = oldPos.left - newPos.left;
    var dy = oldPos.top - newPos.top;
if (dx || dy) {
    c.data.moved = true;
    var s = c.elm.style;
    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
    s.transitionDuration = '0s';
}
}

var platformComponents = {
    Transition: Transition,
    TransitionGroup: TransitionGroup
};

/*  */

// install platform specific utils
   Vue.config.mustUseProp = mustUseProp;
Vue.config.isReservedTag = isReservedTag;
Vue.config.isReservedAttr = isReservedAttr;
Vue.config.getTagNamespace = getTagNamespace;
Vue.config.isUnknownElement = isUnknownElement;

// install platform runtime directives & components
extend(Vue.options.directives, platformDirectives);
extend(Vue.options.components, platformComponents);

// install platform patch function
   Vue.prototype.__patch__ = inBrowser ? patch : noop;

// public mount method
   Vue.prototype.$mount = function (
el,
hydrating
) {
    el = el && inBrowser ? query(el) : undefined;
    return mountComponent(this, el, hydrating)
};

// devtools global hook
       /* istanbul ignore next */
   if (inBrowser) {
setTimeout(function () {
if (config.devtools) {
if (devtools) {
    devtools.emit('init', Vue);
} else {
      console[console.info ? 'info' : 'log'](
  'Download the Vue Devtools extension for a better development experience:\n' +
  'https://github.com/vuejs/vue-devtools'
  );
  }
}
if (config.productionTip !== false &&
typeof console !== 'undefined'
) {
    console[console.info ? 'info' : 'log'](
"You are running Vue in development mode.\n" +
"Make sure to turn on production mode when deploying for production.\n" +
"See more tips at https://vuejs.org/guide/deployment.html"
);
}
}, 0);
}

/*  */

var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;

var buildRegex = cached(function (delimiters) {
    var open = delimiters[0].replace(regexEscapeRE, '\\$&');
    var close = delimiters[1].replace(regexEscapeRE, '\\$&');
    return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
});



function parseText (
text,
delimiters
) {
    var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
if (!tagRE.test(text)) {
    return
}
var tokens = [];
var rawTokens = [];
var lastIndex = tagRE.lastIndex = 0;
var match, index, tokenValue;
while ((match = tagRE.exec(text))) {
    index = match.index;
// push text token
   if (index > lastIndex) {
    rawTokens.push(tokenValue = text.slice(lastIndex, index));
    tokens.push(JSON.stringify(tokenValue));
}
// tag token
   var exp = parseFilters(match[1].trim());
tokens.push(("_s(" + exp + ")"));
rawTokens.push({ '@binding': exp });
lastIndex = index + match[0].length;
}
if (lastIndex < text.length) {
    rawTokens.push(tokenValue = text.slice(lastIndex));
    tokens.push(JSON.stringify(tokenValue));
}
return {
    expression: tokens.join('+'),
    tokens: rawTokens
}
}

/*  */

function transformNode (el, options) {
    var warn = options.warn || baseWarn;
    var staticClass = getAndRemoveAttr(el, 'class');
if (staticClass) {
    var res = parseText(staticClass, options.delimiters);
if (res) {
warn(
"class=\"" + staticClass + "\": " +
'Interpolation inside attributes has been removed. ' +
'Use v-bind or the colon shorthand instead. For example, ' +
'instead of <div class="{{ val }}">, use <div :class="val">.',
el.rawAttrsMap['class']
);
}
}
if (staticClass) {
    el.staticClass = JSON.stringify(staticClass);
}
var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
if (classBinding) {
    el.classBinding = classBinding;
}
}

function genData (el) {
    var data = '';
if (el.staticClass) {
    data += "staticClass:" + (el.staticClass) + ",";
}
if (el.classBinding) {
    data += "class:" + (el.classBinding) + ",";
}
return data
}

var klass$1 = {
    staticKeys: ['staticClass'],
    transformNode: transformNode,
    genData: genData
};

/*  */

function transformNode$1 (el, options) {
    var warn = options.warn || baseWarn;
    var staticStyle = getAndRemoveAttr(el, 'style');
if (staticStyle) {
/* istanbul ignore if */
{
    var res = parseText(staticStyle, options.delimiters);
if (res) {
warn(
"style=\"" + staticStyle + "\": " +
'Interpolation inside attributes has been removed. ' +
'Use v-bind or the colon shorthand instead. For example, ' +
'instead of <div style="{{ val }}">, use <div :style="val">.',
el.rawAttrsMap['style']
);
}
}
el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
}

var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
if (styleBinding) {
    el.styleBinding = styleBinding;
}
}

function genData$1 (el) {
    var data = '';
if (el.staticStyle) {
    data += "staticStyle:" + (el.staticStyle) + ",";
}
if (el.styleBinding) {
    data += "style:(" + (el.styleBinding) + "),";
}
return data
}

var style$1 = {
    staticKeys: ['staticStyle'],
    transformNode: transformNode$1,
    genData: genData$1
};

/*  */

var decoder;

var he = {
decode: function decode (html) {
    decoder = decoder || document.createElement('div');
    decoder.innerHTML = html;
    return decoder.textContent
}
};

/*  */

var isUnaryTag = makeMap(
'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
'link,meta,param,source,track,wbr'
);

// Elements that you can, intentionally, leave open
// (and which close themselves)
var canBeLeftOpenTag = makeMap(
'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
);

// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
                            var isNonPhrasingTag = makeMap(
'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
'title,tr,track'
);

/**
   * Not type-checking this file because it's mostly vendor code.
   */

// Regular Expressions for parsing tags and attributes
   var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
var startTagOpen = new RegExp(("^<" + qnameCapture));
var startTagClose = /^\s*(\/?)>/;
var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
var doctype = /^<!DOCTYPE [^>]+>/i;
// #7298: escape - to avoid being pased as HTML comment when inlined in page
                   var comment = /^<!\--/;
var conditionalComment = /^<!\[/;

// Special Elements (can contain anything)
var isPlainTextElement = makeMap('script,style,textarea', true);
var reCache = {};

var decodingMap = {
'&lt;': '<',
'&gt;': '>',
'&quot;': '"',
'&amp;': '&',
'&#10;': '\n',
'&#9;': '\t',
'&#39;': "'"
};
var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;

// #5992
   var isIgnoreNewlineTag = makeMap('pre,textarea', true);
var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };

function decodeAttr (value, shouldDecodeNewlines) {
    var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
return value.replace(re, function (match) { return decodingMap[match]; })
}

function parseHTML (html, options) {
    var stack = [];
    var expectHTML = options.expectHTML;
    var isUnaryTag$$1 = options.isUnaryTag || no;
    var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
    var index = 0;
    var last, lastTag;
while (html) {
    last = html;
// Make sure we're not in a plaintext content element like script/style
if (!lastTag || !isPlainTextElement(lastTag)) {
    var textEnd = html.indexOf('<');
if (textEnd === 0) {
// Comment:
   if (comment.test(html)) {
    var commentEnd = html.indexOf('-->');

if (commentEnd >= 0) {
if (options.shouldKeepComment) {
    options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
}
advance(commentEnd + 3);
continue
}
}

// http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
          if (conditionalComment.test(html)) {
    var conditionalEnd = html.indexOf(']>');

if (conditionalEnd >= 0) {
advance(conditionalEnd + 2);
    continue
}
}

// Doctype:
   var doctypeMatch = html.match(doctype);
if (doctypeMatch) {
advance(doctypeMatch[0].length);
    continue
}

// End tag:
   var endTagMatch = html.match(endTag);
if (endTagMatch) {
    var curIndex = index;
advance(endTagMatch[0].length);
parseEndTag(endTagMatch[1], curIndex, index);
    continue
}

// Start tag:
   var startTagMatch = parseStartTag();
if (startTagMatch) {
handleStartTag(startTagMatch);
if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
advance(1);
}
continue
}
}

var text = (void 0), rest = (void 0), next = (void 0);
if (textEnd >= 0) {
    rest = html.slice(textEnd);
while (
!endTag.test(rest) &&
!startTagOpen.test(rest) &&
!comment.test(rest) &&
!conditionalComment.test(rest)
) {
// < in plain text, be forgiving and treat it as text
next = rest.indexOf('<', 1);
if (next < 0) { break }
textEnd += next;
rest = html.slice(textEnd);
}
text = html.substring(0, textEnd);
}

if (textEnd < 0) {
    text = html;
}

if (text) {
advance(text.length);
}

if (options.chars && text) {
    options.chars(text, index - text.length, index);
}
} else {
      var endTagLength = 0;
      var stackedTag = lastTag.toLowerCase();
      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
    endTagLength = endTag.length;
if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
    text = text
    .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
    .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
}
if (shouldIgnoreFirstNewline(stackedTag, text)) {
    text = text.slice(1);
}
if (options.chars) {
    options.chars(text);
}
return ''
});
index += html.length - rest$1.length;
html = rest$1;
parseEndTag(stackedTag, index - endTagLength, index);
}

if (html === last) {
    options.chars && options.chars(html);
if (!stack.length && options.warn) {
options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
}
break
}
}

// Clean up any remaining tags
parseEndTag();

function advance (n) {
    index += n;
    html = html.substring(n);
}

function parseStartTag () {
    var start = html.match(startTagOpen);
if (start) {
var match = {
    tagName: start[1],
    attrs: [],
    start: index
};
advance(start[0].length);
var end, attr;
while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
    attr.start = index;
advance(attr[0].length);
    attr.end = index;
    match.attrs.push(attr);
}
if (end) {
    match.unarySlash = end[1];
advance(end[0].length);
    match.end = index;
    return match
}
}
}

function handleStartTag (match) {
    var tagName = match.tagName;
    var unarySlash = match.unarySlash;

if (expectHTML) {
if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
parseEndTag(lastTag);
}
if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
parseEndTag(tagName);
}
}

var unary = isUnaryTag$$1(tagName) || !!unarySlash;

var l = match.attrs.length;
var attrs = new Array(l);
for (var i = 0; i < l; i++) {
    var args = match.attrs[i];
    var value = args[3] || args[4] || args[5] || '';
    var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
    ? options.shouldDecodeNewlinesForHref
: options.shouldDecodeNewlines;
attrs[i] = {
    name: args[1],
    value: decodeAttr(value, shouldDecodeNewlines)
};
if (options.outputSourceRange) {
    attrs[i].start = args.start + args[0].match(/^\s*/).length;
    attrs[i].end = args.end;
}
}

if (!unary) {
stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
lastTag = tagName;
}

if (options.start) {
    options.start(tagName, attrs, unary, match.start, match.end);
}
}

function parseEndTag (tagName, start, end) {
    var pos, lowerCasedTagName;
if (start == null) { start = index; }
if (end == null) { end = index; }

// Find the closest opened tag of the same type
   if (tagName) {
    lowerCasedTagName = tagName.toLowerCase();
    for (pos = stack.length - 1; pos >= 0; pos--) {
if (stack[pos].lowerCasedTag === lowerCasedTagName) {
    break
}
}
} else {
  // If no tag name is provided, clean shop
  pos = 0;
  }

if (pos >= 0) {
// Close all the open elements, up the stack
for (var i = stack.length - 1; i >= pos; i--) {
if (i > pos || !tagName &&
options.warn
) {
options.warn(
("tag <" + (stack[i].tag) + "> has no matching end tag."),
{ start: stack[i].start, end: stack[i].end }
);
}
if (options.end) {
    options.end(stack[i].tag, start, end);
}
}

// Remove the open elements from the stack
   stack.length = pos;
lastTag = pos && stack[pos - 1].tag;
} else if (lowerCasedTagName === 'br') {
if (options.start) {
    options.start(tagName, [], true, start, end);
}
} else if (lowerCasedTagName === 'p') {
if (options.start) {
    options.start(tagName, [], false, start, end);
}
if (options.end) {
    options.end(tagName, start, end);
}
}
}
}

/*  */

var onRE = /^@|^v-on:/;
var dirRE = /^v-|^@|^:/;
var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
var stripParensRE = /^\(|\)$/g;
var dynamicArgRE = /^\[.*\]$/;

var argRE = /:(.*)$/;
var bindRE = /^:|^\.|^v-bind:/;
var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;

var slotRE = /^v-slot(:|$)|^#/;

var lineBreakRE = /[\r\n]/;
var whitespaceRE$1 = /\s+/g;

var invalidAttributeRE = /[\s"'<>\/=]/;

var decodeHTMLCached = cached(he.decode);

var emptySlotScopeToken = "_empty_";

// configurable state
   var warn$2;
var delimiters;
var transforms;
var preTransforms;
var postTransforms;
var platformIsPreTag;
var platformMustUseProp;
var platformGetTagNamespace;
var maybeComponent;

function createASTElement (
tag,
attrs,
parent
) {
return {
type: 1,
tag: tag,
attrsList: attrs,
attrsMap: makeAttrsMap(attrs),
rawAttrsMap: {},
parent: parent,
children: []
}
}

/**
   * Convert HTML string to AST.
   */
function parse (
template,
options
) {
    warn$2 = options.warn || baseWarn;

    platformIsPreTag = options.isPreTag || no;
    platformMustUseProp = options.mustUseProp || no;
    platformGetTagNamespace = options.getTagNamespace || no;
    var isReservedTag = options.isReservedTag || no;
maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };

transforms = pluckModuleFunction(options.modules, 'transformNode');
preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');

delimiters = options.delimiters;

var stack = [];
var preserveWhitespace = options.preserveWhitespace !== false;
var whitespaceOption = options.whitespace;
var root;
var currentParent;
var inVPre = false;
var inPre = false;
var warned = false;

function warnOnce (msg, range) {
if (!warned) {
    warned = true;
    warn$2(msg, range);
}
}

function closeElement (element) {
trimEndingWhitespace(element);
if (!inVPre && !element.processed) {
    element = processElement(element, options);
}
// tree management
   if (!stack.length && element !== root) {
// allow root elements with v-if, v-else-if and v-else
if (root.if && (element.elseif || element.else)) {
{
checkRootConstraints(element);
}
addIfCondition(root, {
                   exp: element.elseif,
                   block: element
               });
} else {
warnOnce(
"Component template should contain exactly one root element. " +
"If you are using v-if on multiple elements, " +
"use v-else-if to chain them instead.",
{ start: element.start }
);
}
}
if (currentParent && !element.forbidden) {
if (element.elseif || element.else) {
processIfConditions(element, currentParent);
} else {
if (element.slotScope) {
// scoped slot
// keep it in the children list so that v-else(-if) conditions can
// find it as the prev node.
var name = element.slotTarget || '"default"'
;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
}
currentParent.children.push(element);
element.parent = currentParent;
}
}

// final children cleanup
// filter out scoped slots
   element.children = element.children.filter(function (c) { return !(c).slotScope; });
// remove trailing whitespace node again
trimEndingWhitespace(element);

// check pre state
   if (element.pre) {
    inVPre = false;
}
if (platformIsPreTag(element.tag)) {
    inPre = false;
}
// apply post-transforms
   for (var i = 0; i < postTransforms.length; i++) {
    postTransforms[i](element, options);
}
}

function trimEndingWhitespace (el) {
// remove trailing whitespace node
   if (!inPre) {
    var lastNode;
while (
(lastNode = el.children[el.children.length - 1]) &&
lastNode.type === 3 &&
lastNode.text === ' '
) {
    el.children.pop();
}
}
}

function checkRootConstraints (el) {
if (el.tag === 'slot' || el.tag === 'template') {
warnOnce(
"Cannot use <" + (el.tag) + "> as component root element because it may " +
'contain multiple nodes.',
{ start: el.start }
);
}
if (el.attrsMap.hasOwnProperty('v-for')) {
warnOnce(
'Cannot use v-for on stateful component root element because ' +
'it renders multiple elements.',
el.rawAttrsMap['v-for']
);
}
}

parseHTML(template, {
warn: warn$2,
expectHTML: options.expectHTML,
isUnaryTag: options.isUnaryTag,
canBeLeftOpenTag: options.canBeLeftOpenTag,
shouldDecodeNewlines: options.shouldDecodeNewlines,
shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
shouldKeepComment: options.comments,
outputSourceRange: options.outputSourceRange,
start: function start (tag, attrs, unary, start$1, end) {
// check namespace.
// inherit parent ns if there is one
var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);

// handle IE svg bug
       /* istanbul ignore if */
   if (isIE && ns === 'svg') {
    attrs = guardIESVGBug(attrs);
}

var element = createASTElement(tag, attrs, currentParent);
if (ns) {
    element.ns = ns;
}

{
if (options.outputSourceRange) {
    element.start = start$1;
    element.end = end;
element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
    cumulated[attr.name] = attr;
    return cumulated
}, {});
}
attrs.forEach(function (attr) {
if (invalidAttributeRE.test(attr.name)) {
warn$2(
"Invalid dynamic argument expression: attribute names cannot contain " +
"spaces, quotes, <, >, / or =.",
{
    start: attr.start + attr.name.indexOf("["),
    end: attr.start + attr.name.length
}
);
}
});
}

if (isForbiddenTag(element) && !isServerRendering()) {
    element.forbidden = true;
warn$2(
'Templates should only be responsible for mapping the state to the ' +
'UI. Avoid placing tags with side-effects in your templates, such as ' +
"<" + tag + ">" + ', as they will not be parsed.',
{ start: element.start }
);
}

// apply pre-transforms
   for (var i = 0; i < preTransforms.length; i++) {
    element = preTransforms[i](element, options) || element;
}

if (!inVPre) {
processPre(element);
if (element.pre) {
    inVPre = true;
}
}
if (platformIsPreTag(element.tag)) {
    inPre = true;
}
if (inVPre) {
processRawAttrs(element);
} else if (!element.processed) {
// structural directives
processFor(element);
processIf(element);
processOnce(element);
}

if (!root) {
    root = element;
{
checkRootConstraints(root);
}
}

if (!unary) {
    currentParent = element;
    stack.push(element);
} else {
  closeElement(element);
  }
},

end: function end (tag, start, end$1) {
    var element = stack[stack.length - 1];
// pop stack
stack.length -= 1;
    currentParent = stack[stack.length - 1];
if (options.outputSourceRange) {
    element.end = end$1;
}
closeElement(element);
},

chars: function chars (text, start, end) {
if (!currentParent) {
{
if (text === template) {
warnOnce(
'Component template requires a root element, rather than just text.',
{ start: start }
);
} else if ((text = text.trim())) {
warnOnce(
("text \"" + text + "\" outside root element will be ignored."),
{ start: start }
);
}
}
return
}
// IE textarea placeholder bug
       /* istanbul ignore if */
   if (isIE &&
currentParent.tag === 'textarea' &&
currentParent.attrsMap.placeholder === text
) {
    return
}
var children = currentParent.children;
if (inPre || text.trim()) {
    text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
} else if (!children.length) {
// remove the whitespace-only node right after an opening tag
text = '';
} else if (whitespaceOption) {
if (whitespaceOption === 'condense') {
// in condense mode, remove the whitespace node if it contains
// line break, otherwise condense to a single space
text = lineBreakRE.test(text) ? '' : ' ';
} else {
      text = ' ';
  }
} else {
      text = preserveWhitespace ? ' ' : '';
  }
if (text) {
if (whitespaceOption === 'condense') {
// condense consecutive whitespaces into single space
text = text.replace(whitespaceRE$1, ' ');
}
var res;
var child;
if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
child = {
    type: 2,
    expression: res.expression,
    tokens: res.tokens,
    text: text
};
} else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
child = {
    type: 3,
    text: text
};
}
if (child) {
if (options.outputSourceRange) {
    child.start = start;
    child.end = end;
}
children.push(child);
}
}
},
comment: function comment (text, start, end) {
// adding anyting as a sibling to the root node is forbidden
// comments should still be allowed, but ignored
if (currentParent) {
var child = {
    type: 3,
    text: text,
    isComment: true
};
if (options.outputSourceRange) {
    child.start = start;
    child.end = end;
}
currentParent.children.push(child);
}
}
});
return root
}

function processPre (el) {
if (getAndRemoveAttr(el, 'v-pre') != null) {
    el.pre = true;
}
}

function processRawAttrs (el) {
    var list = el.attrsList;
    var len = list.length;
if (len) {
    var attrs = el.attrs = new Array(len);
    for (var i = 0; i < len; i++) {
attrs[i] = {
    name: list[i].name,
    value: JSON.stringify(list[i].value)
};
if (list[i].start != null) {
    attrs[i].start = list[i].start;
    attrs[i].end = list[i].end;
}
}
} else if (!el.pre) {
// non root node in pre blocks with no attributes
el.plain = true;
}
}

function processElement (
element,
options
) {
processKey(element);

// determine whether this is a plain element after
// removing structural attributes
element.plain = (
!element.key &&
!element.scopedSlots &&
!element.attrsList.length
);

processRef(element);
processSlotContent(element);
processSlotOutlet(element);
processComponent(element);
    for (var i = 0; i < transforms.length; i++) {
    element = transforms[i](element, options) || element;
}
processAttrs(element);
return element
}

function processKey (el) {
    var exp = getBindingAttr(el, 'key');
if (exp) {
{
if (el.tag === 'template') {
    warn$2(
    "<template> cannot be keyed. Place the key on real elements instead.",
    getRawBindingAttr(el, 'key')
);
}
if (el.for) {
    var iterator = el.iterator2 || el.iterator1;
    var parent = el.parent;
if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
    warn$2(
    "Do not use v-for index as key on <transition-group> children, " +
    "this is the same as not using keys.",
    getRawBindingAttr(el, 'key'),
    true /* tip */
);
}
}
}
el.key = exp;
}
}

function processRef (el) {
    var ref = getBindingAttr(el, 'ref');
if (ref) {
    el.ref = ref;
    el.refInFor = checkInFor(el);
}
}

function processFor (el) {
    var exp;
if ((exp = getAndRemoveAttr(el, 'v-for'))) {
    var res = parseFor(exp);
if (res) {
extend(el, res);
} else {
      warn$2(
      ("Invalid v-for expression: " + exp),
  el.rawAttrsMap['v-for']
  );
  }
}
}



function parseFor (exp) {
    var inMatch = exp.match(forAliasRE);
if (!inMatch) { return }
var res = {};
res.for = inMatch[2].trim();
var alias = inMatch[1].trim().replace(stripParensRE, '');
var iteratorMatch = alias.match(forIteratorRE);
if (iteratorMatch) {
    res.alias = alias.replace(forIteratorRE, '').trim();
    res.iterator1 = iteratorMatch[1].trim();
if (iteratorMatch[2]) {
    res.iterator2 = iteratorMatch[2].trim();
}
} else {
      res.alias = alias;
  }
return res
}

function processIf (el) {
    var exp = getAndRemoveAttr(el, 'v-if');
if (exp) {
    el.if = exp;
addIfCondition(el, {
                   exp: exp,
                   block: el
               });
} else {
if (getAndRemoveAttr(el, 'v-else') != null) {
    el.else = true;
}
var elseif = getAndRemoveAttr(el, 'v-else-if');
if (elseif) {
    el.elseif = elseif;
}
}
}

function processIfConditions (el, parent) {
    var prev = findPrevElement(parent.children);
if (prev && prev.if) {
addIfCondition(prev, {
                   exp: el.elseif,
                   block: el
               });
} else {
      warn$2(
      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
  "used on element <" + (el.tag) + "> without corresponding v-if.",
  el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
  );
  }
}

function findPrevElement (children) {
    var i = children.length;
while (i--) {
if (children[i].type === 1) {
    return children[i]
} else {
if (children[i].text !== ' ') {
    warn$2(
    "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
"will be ignored.",
children[i]
);
}
children.pop();
}
}
}

function addIfCondition (el, condition) {
if (!el.ifConditions) {
    el.ifConditions = [];
}
el.ifConditions.push(condition);
}

function processOnce (el) {
    var once$$1 = getAndRemoveAttr(el, 'v-once');
if (once$$1 != null) {
    el.once = true;
}
}

// handle content being passed to a component as slot,
// e.g. <template slot="xxx">, <div slot-scope="xxx">
                                                    function processSlotContent (el) {
    var slotScope;
if (el.tag === 'template') {
    slotScope = getAndRemoveAttr(el, 'scope');
/* istanbul ignore if */
if (slotScope) {
    warn$2(
    "the \"scope\" attribute for scoped slots have been deprecated and " +
    "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
    "can also be used on plain elements in addition to <template> to " +
    "denote scoped slots.",
    el.rawAttrsMap['scope'],
    true
);
}
el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
} else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
/* istanbul ignore if */
if (el.attrsMap['v-for']) {
    warn$2(
    "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
"(v-for takes higher priority). Use a wrapper <template> for the " +
"scoped slot to make it clearer.",
el.rawAttrsMap['slot-scope'],
true
);
}
el.slotScope = slotScope;
}

// slot="xxx"
var slotTarget = getBindingAttr(el, 'slot');
if (slotTarget) {
    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
// preserve slot as an attribute for native shadow DOM compat
// only for non-scoped slots.
   if (el.tag !== 'template' && !el.slotScope) {
addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
}
}

// 2.6 v-slot syntax
       {
if (el.tag === 'template') {
// v-slot on <template>
var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
if (slotBinding) {
{
if (el.slotTarget || el.slotScope) {
    warn$2(
    "Unexpected mixed usage of different slot syntaxes.",
    el
);
}
if (el.parent && !maybeComponent(el.parent)) {
    warn$2(
    "<template v-slot> can only appear at the root level inside " +
    "the receiving the component",
    el
);
}
}
var ref = getSlotName(slotBinding);
var name = ref.name;
var dynamic = ref.dynamic;
el.slotTarget = name;
el.slotTargetDynamic = dynamic;
el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
}
} else {
  // v-slot on component, denotes default slot
  var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
if (slotBinding$1) {
{
if (!maybeComponent(el)) {
    warn$2(
    "v-slot can only be used on components or <template>.",
    slotBinding$1
);
}
if (el.slotScope || el.slotTarget) {
    warn$2(
    "Unexpected mixed usage of different slot syntaxes.",
    el
);
}
if (el.scopedSlots) {
    warn$2(
    "To avoid scope ambiguity, the default slot should also use " +
    "<template> syntax when there are other named slots.",
    slotBinding$1
);
}
}
// add the component's children to its default slot
var slots = el.scopedSlots || (el.scopedSlots = {});
var ref$1 = getSlotName(slotBinding$1);
var name$1 = ref$1.name;
var dynamic$1 = ref$1.dynamic;
var slotContainer = slots[name$1] = createASTElement('template', [], el);
slotContainer.slotTarget = name$1;
slotContainer.slotTargetDynamic = dynamic$1;
slotContainer.children = el.children.filter(function (c) {
if (!c.slotScope) {
    c.parent = slotContainer;
    return true
}
});
slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
// remove children as they are returned from scopedSlots now
   el.children = [];
// mark el non-plain so data gets generated
   el.plain = false;
}
}
}
}

function getSlotName (binding) {
    var name = binding.name.replace(slotRE, '');
if (!name) {
if (binding.name[0] !== '#') {
    name = 'default';
} else {
      warn$2(
      "v-slot shorthand syntax requires a slot name.",
      binding
  );
  }
}
return dynamicArgRE.test(name)
// dynamic [name]
? { name: name.slice(1, -1), dynamic: true }
// static name
   : { name: ("\"" + name + "\""), dynamic: false }
}

// handle <slot/> outlets
                function processSlotOutlet (el) {
if (el.tag === 'slot') {
    el.slotName = getBindingAttr(el, 'name');
if (el.key) {
    warn$2(
    "`key` does not work on <slot> because slots are abstract outlets " +
    "and can possibly expand into multiple elements. " +
    "Use the key on a wrapping element instead.",
    getRawBindingAttr(el, 'key')
);
}
}
}

function processComponent (el) {
    var binding;
if ((binding = getBindingAttr(el, 'is'))) {
    el.component = binding;
}
if (getAndRemoveAttr(el, 'inline-template') != null) {
    el.inlineTemplate = true;
}
}

function processAttrs (el) {
    var list = el.attrsList;
    var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
    for (i = 0, l = list.length; i < l; i++) {
    name = rawName = list[i].name;
    value = list[i].value;
if (dirRE.test(name)) {
// mark element as dynamic
el.hasBindings = true;
// modifiers
modifiers = parseModifiers(name.replace(dirRE, ''));
// support .foo shorthand syntax for the .prop modifier
   if (modifiers) {
    name = name.replace(modifierRE, '');
}
if (bindRE.test(name)) { // v-bind
name = name.replace(bindRE, '');
    value = parseFilters(value);
    isDynamic = dynamicArgRE.test(name);
if (isDynamic) {
    name = name.slice(1, -1);
}
if (
value.trim().length === 0
) {
    warn$2(
    ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
);
}
if (modifiers) {
if (modifiers.prop && !isDynamic) {
    name = camelize(name);
if (name === 'innerHtml') { name = 'innerHTML'; }
}
if (modifiers.camel && !isDynamic) {
    name = camelize(name);
}
if (modifiers.sync) {
    syncGen = genAssignmentCode(value, "$event");
if (!isDynamic) {
addHandler(
el,
("update:" + (camelize(name))),
syncGen,
null,
false,
warn$2,
list[i]
);
if (hyphenate(name) !== camelize(name)) {
addHandler(
el,
("update:" + (hyphenate(name))),
syncGen,
null,
false,
warn$2,
list[i]
);
}
} else {
  // handler w/ dynamic event name
  addHandler(
  el,
  ("\"update:\"+(" + name + ")"),
  syncGen,
  null,
  false,
  warn$2,
  list[i],
  true // dynamic
  );
  }
}
}
if ((modifiers && modifiers.prop) || (
!el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
)) {
addProp(el, name, value, list[i], isDynamic);
} else {
  addAttr(el, name, value, list[i], isDynamic);
  }
} else if (onRE.test(name)) { // v-on
name = name.replace(onRE, '');
    isDynamic = dynamicArgRE.test(name);
if (isDynamic) {
    name = name.slice(1, -1);
}
addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
} else { // normal directives
  name = name.replace(dirRE, '');
  // parse arg
  var argMatch = name.match(argRE);
      var arg = argMatch && argMatch[1];
      isDynamic = false;
if (arg) {
    name = name.slice(0, -(arg.length + 1));
if (dynamicArgRE.test(arg)) {
    arg = arg.slice(1, -1);
    isDynamic = true;
}
}
addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
if (name === 'model') {
checkForAliasModel(el, value);
}
}
} else {
// literal attribute
   {
       var res = parseText(value, delimiters);
if (res) {
    warn$2(
    name + "=\"" + value + "\": " +
    'Interpolation inside attributes has been removed. ' +
    'Use v-bind or the colon shorthand instead. For example, ' +
    'instead of <div id="{{ val }}">, use <div :id="val">.',
    list[i]
);
}
}
addAttr(el, name, JSON.stringify(value), list[i]);
// #6887 firefox doesn't update muted state if set via attribute
// even immediately after element creation
   if (!el.component &&
name === 'muted' &&
platformMustUseProp(el.tag, el.attrsMap.type, name)) {
addProp(el, name, 'true', list[i]);
}
}
}
}

function checkInFor (el) {
    var parent = el;
while (parent) {
if (parent.for !== undefined) {
    return true
}
parent = parent.parent;
}
return false
}

function parseModifiers (name) {
    var match = name.match(modifierRE);
if (match) {
var ret = {};
match.forEach(function (m) { ret[m.slice(1)] = true; });
return ret
}
}

function makeAttrsMap (attrs) {
var map = {};
for (var i = 0, l = attrs.length; i < l; i++) {
if (
map[attrs[i].name] && !isIE && !isEdge
) {
    warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
}
map[attrs[i].name] = attrs[i].value;
}
return map
}

// for script (e.g. type="x/template") or style, do not decode content
function isTextTag (el) {
    return el.tag === 'script' || el.tag === 'style'
}

function isForbiddenTag (el) {
    return (
    el.tag === 'style' ||
    (el.tag === 'script' && (
    !el.attrsMap.type ||
    el.attrsMap.type === 'text/javascript'
))
)
}

var ieNSBug = /^xmlns:NS\d+/;
var ieNSPrefix = /^NS\d+:/;

/* istanbul ignore next */
function guardIESVGBug (attrs) {
    var res = [];
    for (var i = 0; i < attrs.length; i++) {
    var attr = attrs[i];
if (!ieNSBug.test(attr.name)) {
    attr.name = attr.name.replace(ieNSPrefix, '');
    res.push(attr);
}
}
return res
}

function checkForAliasModel (el, value) {
    var _el = el;
while (_el) {
if (_el.for && _el.alias === value) {
    warn$2(
    "<" + (el.tag) + " v-model=\"" + value + "\">: " +
"You are binding v-model directly to a v-for iteration alias. " +
"This will not be able to modify the v-for source array because " +
"writing to the alias is like modifying a function local variable. " +
"Consider using an array of objects and use v-model on an object property instead.",
el.rawAttrsMap['v-model']
);
}
_el = _el.parent;
}
}

/*  */

function preTransformNode (el, options) {
if (el.tag === 'input') {
    var map = el.attrsMap;
if (!map['v-model']) {
    return
}

var typeBinding;
if (map[':type'] || map['v-bind:type']) {
    typeBinding = getBindingAttr(el, 'type');
}
if (!map.type && !typeBinding && map['v-bind']) {
    typeBinding = "(" + (map['v-bind']) + ").type";
}

if (typeBinding) {
    var ifCondition = getAndRemoveAttr(el, 'v-if', true);
    var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
    var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
    var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
// 1. checkbox
var branch0 = cloneASTElement(el);
// process for on the main node
processFor(branch0);
addRawAttr(branch0, 'type', 'checkbox');
processElement(branch0, options);
    branch0.processed = true; // prevent it from double-processed
branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
addIfCondition(branch0, {
                   exp: branch0.if,
                   block: branch0
               });
// 2. add radio else-if condition
    var branch1 = cloneASTElement(el);
getAndRemoveAttr(branch1, 'v-for', true);
addRawAttr(branch1, 'type', 'radio');
processElement(branch1, options);
addIfCondition(branch0, {
                   exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
                   block: branch1
               });
// 3. other
    var branch2 = cloneASTElement(el);
getAndRemoveAttr(branch2, 'v-for', true);
addRawAttr(branch2, ':type', typeBinding);
processElement(branch2, options);
addIfCondition(branch0, {
                   exp: ifCondition,
                   block: branch2
               });

if (hasElse) {
    branch0.else = true;
} else if (elseIfCondition) {
    branch0.elseif = elseIfCondition;
}

return branch0
}
}
}

function cloneASTElement (el) {
    return createASTElement(el.tag, el.attrsList.slice(), el.parent)
}

var model$1 = {
    preTransformNode: preTransformNode
};

var modules$1 = [
    klass$1,
style$1,
model$1
];

/*  */

function text (el, dir) {
if (dir.value) {
addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
}
}

/*  */

function html (el, dir) {
if (dir.value) {
addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
}
}

var directives$1 = {
    model: model,
    text: text,
    html: html
};

/*  */

var baseOptions = {
    expectHTML: true,
    modules: modules$1,
    directives: directives$1,
    isPreTag: isPreTag,
    isUnaryTag: isUnaryTag,
    mustUseProp: mustUseProp,
    canBeLeftOpenTag: canBeLeftOpenTag,
    isReservedTag: isReservedTag,
    getTagNamespace: getTagNamespace,
    staticKeys: genStaticKeys(modules$1)
};

/*  */

var isStaticKey;
var isPlatformReservedTag;

var genStaticKeysCached = cached(genStaticKeys$1);

/**
   * Goal of the optimizer: walk the generated template AST tree
   * and detect sub-trees that are purely static, i.e. parts of
   * the DOM that never needs to change.
   *
   * Once we detect these sub-trees, we can:
   *
   * 1. Hoist them into constants, so that we no longer need to
   *    create fresh nodes for them on each re-render;
   * 2. Completely skip them in the patching process.
   */
function optimize (root, options) {
if (!root) { return }
isStaticKey = genStaticKeysCached(options.staticKeys || '');
isPlatformReservedTag = options.isReservedTag || no;
// first pass: mark all non-static nodes.
   markStatic$1(root);
// second pass: mark static roots.
markStaticRoots(root, false);
}

function genStaticKeys$1 (keys) {
    return makeMap(
    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
    (keys ? ',' + keys : '')
)
}

function markStatic$1 (node) {
    node.static = isStatic(node);
if (node.type === 1) {
// do not make component slot content static. this avoids
// 1. components not able to mutate slot nodes
// 2. static slot content fails for hot-reloading
    if (
!isPlatformReservedTag(node.tag) &&
node.tag !== 'slot' &&
node.attrsMap['inline-template'] == null
) {
    return
}
for (var i = 0, l = node.children.length; i < l; i++) {
    var child = node.children[i];
    markStatic$1(child);
if (!child.static) {
    node.static = false;
}
}
if (node.ifConditions) {
    for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
    var block = node.ifConditions[i$1].block;
    markStatic$1(block);
if (!block.static) {
    node.static = false;
}
}
}
}
}

function markStaticRoots (node, isInFor) {
if (node.type === 1) {
if (node.static || node.once) {
    node.staticInFor = isInFor;
}
// For a node to qualify as a static root, it should have children that
// are not just static text. Otherwise the cost of hoisting out will
// outweigh the benefits and it's better off to just always render it fresh.
if (node.static && node.children.length && !(
node.children.length === 1 &&
node.children[0].type === 3
)) {
    node.staticRoot = true;
    return
} else {
      node.staticRoot = false;
  }
if (node.children) {
    for (var i = 0, l = node.children.length; i < l; i++) {
markStaticRoots(node.children[i], isInFor || !!node.for);
}
}
if (node.ifConditions) {
    for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
markStaticRoots(node.ifConditions[i$1].block, isInFor);
}
}
}
}

function isStatic (node) {
if (node.type === 2) { // expression
return false
}
if (node.type === 3) { // text
return true
}
return !!(node.pre || (
!node.hasBindings && // no dynamic bindings
      !node.if && !node.for && // not v-if or v-for or v-else
      !isBuiltInTag(node.tag) && // not a built-in
isPlatformReservedTag(node.tag) && // not a component
      !isDirectChildOfTemplateFor(node) &&
Object.keys(node).every(isStaticKey)
))
}

function isDirectChildOfTemplateFor (node) {
while (node.parent) {
    node = node.parent;
if (node.tag !== 'template') {
    return false
}
if (node.for) {
    return true
}
}
return false
}

/*  */

var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
var fnInvokeRE = /\([^)]*?\);*$/;
var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;

// KeyboardEvent.keyCode aliases
   var keyCodes = {
    esc: 27,
    tab: 9,
    enter: 13,
    space: 32,
    up: 38,
    left: 37,
    right: 39,
    down: 40,
'delete': [8, 46]
};

// KeyboardEvent.key aliases
   var keyNames = {
// #7880: IE11 and Edge use `Esc` for Escape key name.
esc: ['Esc', 'Escape'],
tab: 'Tab',
enter: 'Enter',
// #9112: IE11 uses `Spacebar` for Space key name.
space: [' ', 'Spacebar'],
// #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
up: ['Up', 'ArrowUp'],
left: ['Left', 'ArrowLeft'],
right: ['Right', 'ArrowRight'],
down: ['Down', 'ArrowDown'],
// #9112: IE11 uses `Del` for Delete key name.
'delete': ['Backspace', 'Delete', 'Del']
};

// #4868: modifiers that prevent the execution of the listener
// need to explicitly return null so that we can determine whether to remove
// the listener for .once
   var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };

var modifierCode = {
    stop: '$event.stopPropagation();',
    prevent: '$event.preventDefault();',
    self: genGuard("$event.target !== $event.currentTarget"),
    ctrl: genGuard("!$event.ctrlKey"),
    shift: genGuard("!$event.shiftKey"),
    alt: genGuard("!$event.altKey"),
    meta: genGuard("!$event.metaKey"),
    left: genGuard("'button' in $event && $event.button !== 0"),
    middle: genGuard("'button' in $event && $event.button !== 1"),
    right: genGuard("'button' in $event && $event.button !== 2")
};

function genHandlers (
events,
isNative
) {
    var prefix = isNative ? 'nativeOn:' : 'on:';
    var staticHandlers = "";
    var dynamicHandlers = "";
for (var name in events) {
    var handlerCode = genHandler(events[name]);
if (events[name] && events[name].dynamic) {
    dynamicHandlers += name + "," + handlerCode + ",";
} else {
      staticHandlers += "\"" + name + "\":" + handlerCode + ",";
  }
}
staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
if (dynamicHandlers) {
    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
} else {
      return prefix + staticHandlers
  }
}

function genHandler (handler) {
if (!handler) {
    return 'function(){}'
}

if (Array.isArray(handler)) {
return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
}

var isMethodPath = simplePathRE.test(handler.value);
var isFunctionExpression = fnExpRE.test(handler.value);
var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));

if (!handler.modifiers) {
if (isMethodPath || isFunctionExpression) {
    return handler.value
}
return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
} else {
      var code = '';
      var genModifierCode = '';
      var keys = [];
for (var key in handler.modifiers) {
if (modifierCode[key]) {
    genModifierCode += modifierCode[key];
// left/right
        if (keyCodes[key]) {
    keys.push(key);
}
} else if (key === 'exact') {
    var modifiers = (handler.modifiers);
genModifierCode += genGuard(
['ctrl', 'shift', 'alt', 'meta']
.filter(function (keyModifier) { return !modifiers[keyModifier]; })
.map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
.join('||')
);
} else {
      keys.push(key);
  }
}
if (keys.length) {
    code += genKeyFilter(keys);
}
// Make sure modifiers like prevent and stop get executed after key filtering
   if (genModifierCode) {
    code += genModifierCode;
}
var handlerCode = isMethodPath
        ? ("return " + (handler.value) + "($event)")
: isFunctionExpression
          ? ("return (" + (handler.value) + ")($event)")
: isFunctionInvocation
            ? ("return " + (handler.value))
: handler.value;
return ("function($event){" + code + handlerCode + "}")
}
}

function genKeyFilter (keys) {
    return (
    // make sure the key filters only apply to KeyboardEvents
    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
// key events that do not have keyCode property...
"if(!$event.type.indexOf('key')&&" +
(keys.map(genFilterCode).join('&&')) + ")return null;"
)
}

function genFilterCode (key) {
    var keyVal = parseInt(key, 10);
if (keyVal) {
    return ("$event.keyCode!==" + keyVal)
}
var keyCode = keyCodes[key];
var keyName = keyNames[key];
return (
"_k($event.keyCode," +
(JSON.stringify(key)) + "," +
(JSON.stringify(keyCode)) + "," +
"$event.key," +
"" + (JSON.stringify(keyName)) +
")"
)
}

/*  */

function on (el, dir) {
if (dir.modifiers) {
warn("v-on without argument does not support modifiers.");
}
el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
}

/*  */

function bind$1 (el, dir) {
el.wrapData = function (code) {
    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
};
}

/*  */

var baseDirectives = {
    on: on,
    bind: bind$1,
    cloak: noop
};

/*  */





var CodegenState = function CodegenState (options) {
    this.options = options;
    this.warn = options.warn || baseWarn;
    this.transforms = pluckModuleFunction(options.modules, 'transformCode');
    this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
this.directives = extend(extend({}, baseDirectives), options.directives);
var isReservedTag = options.isReservedTag || no;
this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
this.onceId = 0;
this.staticRenderFns = [];
this.pre = false;
};



function generate (
ast,
options
) {
    var state = new CodegenState(options);
    var code = ast ? genElement(ast, state) : '_c("div")';
return {
    render: ("with(this){return " + code + "}"),
staticRenderFns: state.staticRenderFns
}
}

function genElement (el, state) {
if (el.parent) {
    el.pre = el.pre || el.parent.pre;
}

if (el.staticRoot && !el.staticProcessed) {
    return genStatic(el, state)
} else if (el.once && !el.onceProcessed) {
    return genOnce(el, state)
} else if (el.for && !el.forProcessed) {
    return genFor(el, state)
} else if (el.if && !el.ifProcessed) {
    return genIf(el, state)
} else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
    return genChildren(el, state) || 'void 0'
} else if (el.tag === 'slot') {
    return genSlot(el, state)
} else {
  // component or element
  var code;
if (el.component) {
    code = genComponent(el.component, el, state);
} else {
      var data;
if (!el.plain || (el.pre && state.maybeComponent(el))) {
    data = genData$2(el, state);
}

var children = el.inlineTemplate ? null : genChildren(el, state, true);
code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
}
// module transforms
   for (var i = 0; i < state.transforms.length; i++) {
    code = state.transforms[i](el, code);
}
return code
}
}

// hoist static sub-trees out
   function genStatic (el, state) {
    el.staticProcessed = true;
// Some elements (templates) need to behave differently inside of a v-pre
// node.  All pre nodes are static roots, so we can use this as a location to
// wrap a state change and reset it upon exiting the pre node.
var originalPreState = state.pre;
if (el.pre) {
    state.pre = el.pre;
}
state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
state.pre = originalPreState;
return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
}

// v-once
   function genOnce (el, state) {
    el.onceProcessed = true;
if (el.if && !el.ifProcessed) {
    return genIf(el, state)
} else if (el.staticInFor) {
    var key = '';
    var parent = el.parent;
while (parent) {
if (parent.for) {
    key = parent.key;
    break
}
parent = parent.parent;
}
if (!key) {
    state.warn(
    "v-once can only be used inside v-for that is keyed. ",
    el.rawAttrsMap['v-once']
    );
    return genElement(el, state)
}
return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
} else {
      return genStatic(el, state)
  }
}

function genIf (
el,
state,
altGen,
altEmpty
) {
    el.ifProcessed = true; // avoid recursion
return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
}

function genIfConditions (
conditions,
state,
altGen,
altEmpty
) {
if (!conditions.length) {
    return altEmpty || '_e()'
}

var condition = conditions.shift();
if (condition.exp) {
    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
} else {
      return ("" + (genTernaryExp(condition.block)))
  }

// v-if with v-once should generate code like (a)?_m(0):_m(1)
                                                       function genTernaryExp (el) {
    return altGen
    ? altGen(el, state)
: el.once
? genOnce(el, state)
: genElement(el, state)
}
}

function genFor (
el,
state,
altGen,
altHelper
) {
    var exp = el.for;
    var alias = el.alias;
    var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
    var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';

if (state.maybeComponent(el) &&
el.tag !== 'slot' &&
el.tag !== 'template' &&
!el.key
) {
    state.warn(
    "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
    "v-for should have explicit keys. " +
    "See https://vuejs.org/guide/list.html#key for more info.",
    el.rawAttrsMap['v-for'],
    true /* tip */
);
}

el.forProcessed = true; // avoid recursion
                           return (altHelper || '_l') + "((" + exp + ")," +
"function(" + alias + iterator1 + iterator2 + "){" +
"return " + ((altGen || genElement)(el, state)) +
'})'
}

function genData$2 (el, state) {
    var data = '{';

// directives first.
// directives may mutate the el's other properties before they are generated.
var dirs = genDirectives(el, state);
if (dirs) { data += dirs + ','; }

// key
   if (el.key) {
    data += "key:" + (el.key) + ",";
}
// ref
   if (el.ref) {
    data += "ref:" + (el.ref) + ",";
}
if (el.refInFor) {
    data += "refInFor:true,";
}
// pre
   if (el.pre) {
    data += "pre:true,";
}
// record original tag name for components using "is" attribute
                                                      if (el.component) {
    data += "tag:\"" + (el.tag) + "\",";
}
// module data generation functions
   for (var i = 0; i < state.dataGenFns.length; i++) {
    data += state.dataGenFns[i](el);
}
// attributes
   if (el.attrs) {
    data += "attrs:" + (genProps(el.attrs)) + ",";
}
// DOM props
   if (el.props) {
    data += "domProps:" + (genProps(el.props)) + ",";
}
// event handlers
   if (el.events) {
    data += (genHandlers(el.events, false)) + ",";
}
if (el.nativeEvents) {
    data += (genHandlers(el.nativeEvents, true)) + ",";
}
// slot target
// only for non-scoped slots
   if (el.slotTarget && !el.slotScope) {
    data += "slot:" + (el.slotTarget) + ",";
}
// scoped slots
   if (el.scopedSlots) {
    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
}
// component v-model
   if (el.model) {
    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
}
// inline-template
   if (el.inlineTemplate) {
    var inlineTemplate = genInlineTemplate(el, state);
if (inlineTemplate) {
    data += inlineTemplate + ",";
}
}
data = data.replace(/,$/, '') + '}';
// v-bind dynamic argument wrap
// v-bind with dynamic arguments must be applied using the same v-bind object
// merge helper so that class/style/mustUseProp attrs are handled correctly.
   if (el.dynamicAttrs) {
    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
}
// v-bind data wrap
   if (el.wrapData) {
    data = el.wrapData(data);
}
// v-on data wrap
   if (el.wrapListeners) {
    data = el.wrapListeners(data);
}
return data
}

function genDirectives (el, state) {
    var dirs = el.directives;
if (!dirs) { return }
var res = 'directives:[';
var hasRuntime = false;
var i, l, dir, needRuntime;
for (i = 0, l = dirs.length; i < l; i++) {
    dir = dirs[i];
    needRuntime = true;
    var gen = state.directives[dir.name];
if (gen) {
// compile-time directive that manipulates AST.
// returns true if it also needs a runtime counterpart.
needRuntime = !!gen(el, dir, state.warn);
}
if (needRuntime) {
    hasRuntime = true;
    res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
}
}
if (hasRuntime) {
    return res.slice(0, -1) + ']'
}
}

function genInlineTemplate (el, state) {
    var ast = el.children[0];
if (el.children.length !== 1 || ast.type !== 1) {
state.warn(
'Inline-template components must have exactly one child element.',
{ start: el.start }
);
}
if (ast && ast.type === 1) {
    var inlineRenderFns = generate(ast, state.options);
return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
}
}

function genScopedSlots (
el,
slots,
state
) {
// by default scoped slots are considered "stable", this allows child
// components with only scoped slots to skip forced updates from parent.
// but in some cases we have to bail-out of this optimization
// for example if the slot contains dynamic names, has v-if or v-for on them...
var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
    var slot = slots[key];
    return (
    slot.slotTargetDynamic ||
    slot.if ||
    slot.for ||
    containsSlotChild(slot) // is passing down slot from parent which may be dynamic
)
});

// #9534: if a component with scoped slots is inside a conditional branch,
// it's possible for the same component to be reused but with different
// compiled slot content. To avoid that, we generate a unique key based on
// the generated code of all the slot contents.
   var needsKey = !!el.if;

// OR when it is inside another scoped slot or v-for (the reactivity may be
// disconnected due to the intermediate scope variable)
// #9438, #9506
// TODO: this can be further optimized by properly analyzing in-scope bindings
// and skip force updating ones that do not actually use scope variables.
   if (!needsForceUpdate) {
    var parent = el.parent;
while (parent) {
if (
(parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
          parent.for
) {
    needsForceUpdate = true;
    break
}
if (parent.if) {
    needsKey = true;
}
parent = parent.parent;
}
}

var generatedSlots = Object.keys(slots)
.map(function (key) { return genScopedSlot(slots[key], state); })
.join(',');

return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
}

function hash(str) {
    var hash = 5381;
    var i = str.length;
while(i) {
    hash = (hash * 33) ^ str.charCodeAt(--i);
}
return hash >>> 0
}

function containsSlotChild (el) {
if (el.type === 1) {
if (el.tag === 'slot') {
    return true
}
return el.children.some(containsSlotChild)
}
return false
}

function genScopedSlot (
el,
state
) {
    var isLegacySyntax = el.attrsMap['slot-scope'];
if (el.if && !el.ifProcessed && !isLegacySyntax) {
    return genIf(el, state, genScopedSlot, "null")
}
if (el.for && !el.forProcessed) {
    return genFor(el, state, genScopedSlot)
}
var slotScope = el.slotScope === emptySlotScopeToken
      ? ""
: String(el.slotScope);
var fn = "function(" + slotScope + "){" +
"return " + (el.tag === 'template'
? el.if && isLegacySyntax
          ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
: genChildren(el, state) || 'undefined'
: genElement(el, state)) + "}";
// reverse proxy v-slot without scope on this.$slots
   var reverseProxy = slotScope ? "" : ",proxy:true";
return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
}

function genChildren (
el,
state,
checkSkip,
altGenElement,
altGenNode
) {
    var children = el.children;
if (children.length) {
    var el$1 = children[0];
// optimize single v-for
   if (children.length === 1 &&
el$1.for &&
el$1.tag !== 'template' &&
el$1.tag !== 'slot'
) {
    var normalizationType = checkSkip
    ? state.maybeComponent(el$1) ? ",1" : ",0"
: "";
    return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
}
var normalizationType$1 = checkSkip
        ? getNormalizationType(children, state.maybeComponent)
: 0;
var gen = altGenNode || genNode;
return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
}
}

// determine the normalization needed for the children array.
// 0: no normalization needed
// 1: simple normalization needed (possible 1-level deep nested array)
// 2: full normalization needed
    function getNormalizationType (
children,
maybeComponent
) {
    var res = 0;
    for (var i = 0; i < children.length; i++) {
    var el = children[i];
if (el.type !== 1) {
    continue
}
if (needsNormalization(el) ||
(el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
    res = 2;
    break
}
if (maybeComponent(el) ||
(el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
    res = 1;
}
}
return res
}

function needsNormalization (el) {
    return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
}

function genNode (node, state) {
if (node.type === 1) {
    return genElement(node, state)
} else if (node.type === 3 && node.isComment) {
    return genComment(node)
} else {
      return genText(node)
  }
}

function genText (text) {
    return ("_v(" + (text.type === 2
    ? text.expression // no need for () because already wrapped in _s()
: transformSpecialNewlines(JSON.stringify(text.text))) + ")")
}

function genComment (comment) {
    return ("_e(" + (JSON.stringify(comment.text)) + ")")
}

function genSlot (el, state) {
    var slotName = el.slotName || '"default"';
    var children = genChildren(el, state);
    var res = "_t(" + slotName + (children ? ("," + children) : '');
var attrs = el.attrs || el.dynamicAttrs
? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
// slot props are camelized
name: camelize(attr.name),
value: attr.value,
dynamic: attr.dynamic
}); }))
: null;
var bind$$1 = el.attrsMap['v-bind'];
if ((attrs || bind$$1) && !children) {
    res += ",null";
}
if (attrs) {
    res += "," + attrs;
}
if (bind$$1) {
    res += (attrs ? '' : ',null') + "," + bind$$1;
}
return res + ')'
}

// componentName is el.component, take it as argument to shun flow's pessimistic refinement
function genComponent (
componentName,
el,
state
) {
    var children = el.inlineTemplate ? null : genChildren(el, state, true);
    return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
}

function genProps (props) {
    var staticProps = "";
    var dynamicProps = "";
    for (var i = 0; i < props.length; i++) {
    var prop = props[i];
    var value = transformSpecialNewlines(prop.value);
if (prop.dynamic) {
    dynamicProps += (prop.name) + "," + value + ",";
} else {
      staticProps += "\"" + (prop.name) + "\":" + value + ",";
  }
}
staticProps = "{" + (staticProps.slice(0, -1)) + "}";
if (dynamicProps) {
    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
} else {
      return staticProps
  }
}

// #3895, #4268
function transformSpecialNewlines (text) {
    return text
    .replace(/\u2028/g, '\\u2028')
    .replace(/\u2029/g, '\\u2029')
}

/*  */



// these keywords should not appear inside expressions, but operators like
// typeof, instanceof and in are allowed
var prohibitedKeywordRE = new RegExp('\\b' + (
'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
'super,throw,while,yield,delete,export,import,return,switch,default,' +
'extends,finally,continue,debugger,function,arguments'
).split(',').join('\\b|\\b') + '\\b');

// these unary operators should not be used as property/method names
                                                        var unaryOperatorsRE = new RegExp('\\b' + (
'delete,typeof,void'
).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');

// strip strings in expressions
   var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;

// detect problematic expressions in a template
   function detectErrors (ast, warn) {
if (ast) {
checkNode(ast, warn);
}
}

function checkNode (node, warn) {
if (node.type === 1) {
for (var name in node.attrsMap) {
if (dirRE.test(name)) {
    var value = node.attrsMap[name];
if (value) {
    var range = node.rawAttrsMap[name];
if (name === 'v-for') {
checkFor(node, ("v-for=\"" + value + "\""), warn, range);
} else if (onRE.test(name)) {
checkEvent(value, (name + "=\"" + value + "\""), warn, range);
} else {
  checkExpression(value, (name + "=\"" + value + "\""), warn, range);
  }
}
}
}
if (node.children) {
    for (var i = 0; i < node.children.length; i++) {
checkNode(node.children[i], warn);
}
}
} else if (node.type === 2) {
checkExpression(node.expression, node.text, warn, node);
}
}

function checkEvent (exp, text, warn, range) {
    var stipped = exp.replace(stripStringRE, '');
    var keywordMatch = stipped.match(unaryOperatorsRE);
if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
warn(
"avoid using JavaScript unary operator as property name: " +
"\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
range
);
}
checkExpression(exp, text, warn, range);
}

function checkFor (node, text, warn, range) {
checkExpression(node.for || '', text, warn, range);
checkIdentifier(node.alias, 'v-for alias', text, warn, range);
checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
}

function checkIdentifier (
ident,
type,
text,
warn,
range
) {
if (typeof ident === 'string') {
try {
    new Function(("var " + ident + "=_"));
} catch (e) {
warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
}
}
}

function checkExpression (exp, text, warn, range) {
try {
    new Function(("return " + exp));
} catch (e) {
    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
if (keywordMatch) {
warn(
"avoid using JavaScript keyword as property name: " +
"\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
range
);
} else {
  warn(
  "invalid expression: " + (e.message) + " in\n\n" +
  "    " + exp + "\n\n" +
  "  Raw expression: " + (text.trim()) + "\n",
  range
  );
  }
}
}

/*  */

var range = 2;

function generateCodeFrame (
source,
start,
end
) {
    if ( start === void 0 ) start = 0;
    if ( end === void 0 ) end = source.length;

    var lines = source.split(/\r?\n/);
    var count = 0;
    var res = [];
    for (var i = 0; i < lines.length; i++) {
    count += lines[i].length + 1;
if (count >= start) {
    for (var j = i - range; j <= i + range || end > count; j++) {
if (j < 0 || j >= lines.length) { continue }
res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
var lineLength = lines[j].length;
if (j === i) {
// push underline
var pad = start - (count - lineLength) + 1;
    var length = end > count ? lineLength - pad : end - start;
    res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
} else if (j > i) {
if (end > count) {
    var length$1 = Math.min(end - count, lineLength);
    res.push("   |  " + repeat$1("^", length$1));
}
count += lineLength + 1;
}
}
break
}
}
return res.join('\n')
}

function repeat$1 (str, n) {
    var result = '';
if (n > 0) {
while (true) { // eslint-disable-line
                  if (n & 1) { result += str; }
n >>>= 1;
if (n <= 0) { break }
str += str;
}
}
return result
}

/*  */



function createFunction (code, errors) {
try {
    return new Function(code)
} catch (err) {
errors.push({ err: err, code: code });
return noop
}
}

function createCompileToFunctionFn (compile) {
    var cache = Object.create(null);

return function compileToFunctions (
template,
options,
vm
) {
options = extend({}, options);
var warn$$1 = options.warn || warn;
delete options.warn;

/* istanbul ignore if */
{
// detect possible CSP restriction
   try {
       new Function('return 1');
   } catch (e) {
if (e.toString().match(/unsafe-eval|CSP/)) {
    warn$$1(
    'It seems you are using the standalone build of Vue.js in an ' +
    'environment with Content Security Policy that prohibits unsafe-eval. ' +
    'The template compiler cannot work in this environment. Consider ' +
    'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
    'templates into render functions.'
);
}
}
}

// check cache
   var key = options.delimiters
? String(options.delimiters) + template
                             : template;
if (cache[key]) {
    return cache[key]
}

// compile
   var compiled = compile(template, options);

// check compilation errors/tips
                            {
if (compiled.errors && compiled.errors.length) {
if (options.outputSourceRange) {
compiled.errors.forEach(function (e) {
    warn$$1(
    "Error compiling template:\n\n" + (e.msg) + "\n\n" +
generateCodeFrame(template, e.start, e.end),
vm
);
});
} else {
warn$$1(
"Error compiling template:\n\n" + template + "\n\n" +
                                                    compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
vm
);
}
}
if (compiled.tips && compiled.tips.length) {
if (options.outputSourceRange) {
compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
} else {
compiled.tips.forEach(function (msg) { return tip(msg, vm); });
}
}
}

// turn code into functions
   var res = {};
var fnGenErrors = [];
res.render = createFunction(compiled.render, fnGenErrors);
res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
    return createFunction(code, fnGenErrors)
});

// check function generation errors.
// this should only happen if there is a bug in the compiler itself.
// mostly for codegen development use
       /* istanbul ignore if */
   {
if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
warn$$1(
"Failed to generate render function:\n\n" +
                                          fnGenErrors.map(function (ref) {
    var err = ref.err;
    var code = ref.code;

    return ((err.toString()) + " in\n\n" + code + "\n");
}).join('\n'),
vm
);
}
}

return (cache[key] = res)
}
}

/*  */

function createCompilerCreator (baseCompile) {
return function createCompiler (baseOptions) {
function compile (
template,
options
) {
    var finalOptions = Object.create(baseOptions);
    var errors = [];
    var tips = [];

var warn = function (msg, range, tip) {
(tip ? tips : errors).push(msg);
};

if (options) {
if (options.outputSourceRange) {
// $flow-disable-line
var leadingSpaceLength = template.match(/^\s*/)[0].length;

warn = function (msg, range, tip) {
var data = { msg: msg };
if (range) {
if (range.start != null) {
    data.start = range.start + leadingSpaceLength;
}
if (range.end != null) {
    data.end = range.end + leadingSpaceLength;
}
}
(tip ? tips : errors).push(data);
};
}
// merge custom modules
   if (options.modules) {
    finalOptions.modules =
    (baseOptions.modules || []).concat(options.modules);
}
// merge custom directives
   if (options.directives) {
    finalOptions.directives = extend(
    Object.create(baseOptions.directives || null),
    options.directives
    );
}
// copy other options
   for (var key in options) {
if (key !== 'modules' && key !== 'directives') {
    finalOptions[key] = options[key];
}
}
}

finalOptions.warn = warn;

var compiled = baseCompile(template.trim(), finalOptions);
{
detectErrors(compiled.ast, warn);
}
compiled.errors = errors;
compiled.tips = tips;
return compiled
}

return {
    compile: compile,
    compileToFunctions: createCompileToFunctionFn(compile)
}
}
}

/*  */

// `createCompilerCreator` allows creating compilers that use alternative
// parser/optimizer/codegen, e.g the SSR optimizing compiler.
// Here we just export a default compiler using the default parts.
   var createCompiler = createCompilerCreator(function baseCompile (
template,
options
) {
    var ast = parse(template.trim(), options);
if (options.optimize !== false) {
optimize(ast, options);
}
var code = generate(ast, options);
return {
    ast: ast,
    render: code.render,
    staticRenderFns: code.staticRenderFns
}
});

/*  */

var ref$1 = createCompiler(baseOptions);
var compile = ref$1.compile;
var compileToFunctions = ref$1.compileToFunctions;

/*  */

// check whether current browser encodes a char inside attribute values
   var div;
function getShouldDecode (href) {
    div = div || document.createElement('div');
    div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
    return div.innerHTML.indexOf('&#10;') > 0
}

// #3663: IE encodes newlines inside attribute values while other browsers don't
var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
// #6828: chrome encodes content in a[href]
   var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;

/*  */

var idToTemplate = cached(function (id) {
    var el = query(id);
    return el && el.innerHTML
});

var mount = Vue.prototype.$mount;
Vue.prototype.$mount = function (
el,
hydrating
) {
    el = el && query(el);

/* istanbul ignore if */
if (el === document.body || el === document.documentElement) {
warn(
"Do not mount Vue to <html> or <body> - mount to normal elements instead."
);
    return this
}

var options = this.$options;
// resolve template/el and convert to render function
                    if (!options.render) {
    var template = options.template;
if (template) {
if (typeof template === 'string') {
if (template.charAt(0) === '#') {
    template = idToTemplate(template);
/* istanbul ignore if */
if (!template) {
warn(
("Template element not found or is empty: " + (options.template)),
this
);
}
}
} else if (template.nodeType) {
    template = template.innerHTML;
} else {
{
warn('invalid template option:' + template, this);
}
return this
}
} else if (el) {
    template = getOuterHTML(el);
}
if (template) {
/* istanbul ignore if */
if (config.performance && mark) {
mark('compile');
}

var ref = compileToFunctions(template, {
                                 outputSourceRange: "development" !== 'production',
                                 shouldDecodeNewlines: shouldDecodeNewlines,
                                 shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
                                 delimiters: options.delimiters,
                                 comments: options.comments
                             }, this);
var render = ref.render;
var staticRenderFns = ref.staticRenderFns;
options.render = render;
options.staticRenderFns = staticRenderFns;

/* istanbul ignore if */
if (config.performance && mark) {
mark('compile end');
measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
}
}
}
return mount.call(this, el, hydrating)
};

/**
   * Get outerHTML of elements, taking care
   * of SVG elements in IE as well.
   */
function getOuterHTML (el) {
if (el.outerHTML) {
    return el.outerHTML
} else {
      var container = document.createElement('div');
      container.appendChild(el.cloneNode(true));
      return container.innerHTML
  }
}

Vue.compile = compileToFunctions;

return Vue;

}));
